Data Last Updated: July 1, 2025

ZIP Code 21667 in Still Pond, MD

City: The City name that the USPS assigned as primary for this ZIP Code.	Still Pond, Maryland
County: ZIP Code 21667 is located in 1 County.	Kent County
Timezone: The Time Zone(s) covered. There are 7 standard time zones which are, from west to east: Hawaii-Aleutian, Alaska, Pacific, Mountain, Central, Eastern, Atlantic. Also included in U.S. Territories are Samoa, Guam and Palau.	Eastern (GMT -05:00)
Local Time: The current local time for each timezone. If more than 1 time zone for this area, all local times will be shown. Area codes can cross timezones, so more than 1 may be shown.	12:46:46 AM
Population: The number of people living in the 21667 ZIP Code from the U.S. Census 2020. Included are U.S. Citizens, permanent residents, temporary migrants, and undocumented individuals. The total represents people who live here, not just those present while the Census was being completed.	285 [See All]
Area Codes: There are 1 Area Codes assigned to this ZIP Code.	667 / 410
Classification: This type is assigned to ZIP Codes which primarily use street delivery to mailboxes. Standard (Non-Unique) types can include PO Boxes, but this will be the minority use.	Standard [Normal Street Delivery]
Coordinates: The latitude/longitude centroid coordinates for this area.	39.3298, -76.0510
Land Area: The approximate amount of land area covered by ZIP Code 21667 in square miles.	6.975 sq mi
Quick Link: Copy the direct link to this page and use anywhere you like!	https://www.zip-codes.com/zip-code/21667/zip-code-21667.asp

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ZIP Code 21667 Demographic Profile

Population & People

Total Population

285

More | See by Race

Income

Median Household Income

$61,505

See Chart

Housing

Total Housing Units

171

Health

Without Healthcare Coverage

2.61%

See Chart

Business & Economy

Total Businesses

Families

Total Households

134

Employment

Employment Rate

70.16%

See Chart

Education

Bachelor's Degree or Higher

11.52%

Important ZIP Code 21667 Information

ZIP Code 21667 is located in the city of Still Pond, Maryland and covers 6.975 square miles of land area. It is also located within Kent County.

According to the 2020 U.S. Census, there are 285 people in 134 households. ZIP-Codes.com estimates that the current population is 232. It has a population density of 40.9 people per square mile.

21667 is classified as a "non-unique", also known as a Standard ZIP Code. Its primary purpose is for normal street, apartment, and business mailbox delivery. Carriers will deliver mail to this region through vehicles, walking routes, and other means. It may also have PO Boxes located at the USPS facility.

21667 is in the Eastern (GMT -05:00) timezone and does observe daylight saving time. It has 2 Area Codes providing telephone service, including 667 and 410.

The Map above shows the boundaries and what geography it covers. More Demographics are available below, including charts for population by race, population by gender, population over time, house value, income over time, and much more. Local Public, Private, and Post Secondary Schools shows which schools are nearby.

21667 is in a locale that is not assigned to a Core-Based Statistical Area (CBSA). CBSA's are geographic regions with significant populations of 10,000+ and adjacent communities which integrate with the core area.

The 21667 ZIP Code is home to 3 businesses, employing 21 people. That is an average of 7.0 employees per business. Annual payroll for these businesses is $884,000. See Other Demographics.

ZIP Code 21667 Demographics

Current Population: This field gives the estimated household population for this ZIP Code for February, 2025. This is derived from known delivery information, household occupancy rates, household size, and more to come up with an accurate estimation for the current population. IMPORTANT: This does not include population totals for persons in nursing homes, correctional facilities, or other institutions. This is an estimation of the household population based on US Postal Service delivery information.	232
2020 Population: Total Population from the 2020 Census. This reflects the exact population of the geographic region at that point in time, not future estimates, regardless of citizenship or immigration status. It is intended to count all persons living within the geographic area, not just those present on the day of the census.	285
Population Density: Population density is a measurement of population per unit of land area. In this case, the number is expressed in people per square mile.	40.9 people per square mile
Average Income: The Median Household income from the Census American Community Survey.	$61,505

Households: Total estimated amount of households based on Census 2020 ZCTA.	134
Average House Value: The Median house value from the Census American Community Survey.	$0
Persons Per Household: Avg number of individuals per household. The avg number of individuals per household are not projected to the future, they are actual Census 2020 numbers.	2.13
Average Family Size: Average Family Size is calculated by dividing the number of people in a Family Household by the number of Family Households. The U.S. Census Bureau defines family households as households consisting of two or more individuals who are related by birth, marriage, or adoption. They also may include other unrelated people. Non-family households consist of people who live alone or who share their residence with unrelated individuals. The Avg Family Size only looks at the households classified as Family Households. This value from the U.S. Census ACS (American Community Survey) and is updated yearly.	3.05

Pie Chart & Table Comparison Chart

Population by Race

White: The number of individuals who selected White as their race from the 2020 Census for this geographic area. The numbers for the White Population are not future projections. On the 2020 U.S. Census questionnaire, people were asked to check all races which applied to them, including White. This includes all who selected White/Caucasian in their response, even if they selected another race as well.	249	89.57%
Black: The number of individuals who selected Black as their race from the 2020 Census for this geographic area. The numbers for the Black Population are not future projections. On the 2020 U.S. Census questionnaire, people were asked to check all races which applied to them, including Black or African American. This includes all who selected Black or African American in their response, even if they selected another race as well.	13	4.68%
Hispanic: The number of individuals who selected Hispanic from the 2020 Census for this geographic region. On the 2020 U.S. Census questionnaire, people were first asked for their Ethnicity, including if they were from Hispanic, Latino, or Spanish Origin, including Mexican, Mexican American, Chicano, Puerto Rican, Cuban, or other ethnic origin. This includes all who affirmed that they were part of this ethnic origin. Respondents who selected this option were also asked to select a race separately and would be counted once in this number as well as the race they chose. From the U.S. Census definition, Hispanic is an ethnic origin and not a race.	10	3.60%
Asian: The number of individuals who selected Asian as their race from the 2020 Census for this geographic area, not future projections. On the U.S. Census questionnaire, people were asked to check all races which applied to them, including Chinese, Filipino, Asian Indian, Vietnamese, Korean, Japanese, or Other Asian. This includes all who selected one of these options in their response, even if they selected another race as well.	1	0.36%
American Indian: The number of individuals who selected American Indian or Alaska Native Population as their race from the 2020 Census for this geographic region and not estimates for the future. On the 2020 U.S. Census questionnaire, people were asked to check all races which applied to them, including American Indian and Alaska Native. This includes all who selected American Indian and Alaska Native in their response, even if they selected another race as well.	0	0%
Hawaiian: The number of individuals who selected Hawaiian or Pacific Islander Population as their race from the 2020 Census for this geographic region and are not future projections. On the 2020 U.S. Census questionnaire, people were asked to check all races which applied to them, including Native Hawaiian and Pacific Islander. This includes all who selected either Hawaiian or Pacific Islander in their response, even if they selected another race as well.	0	0%
Other: The number of people for all other races per ZIP code based on Census 2020 Zip Code Tabulation Area. The other race population numbers are not projected to the future, they are actual Census 2020 numbers.	5	1.80%

Pie Chart showing Population by Race: White [249, 89.57%], Black [13, 4.68%], Hispanic [10, 3.60%], Asian [1, 0.36%], Hawaiian [0, 0%], American Indian 0, 0%], and Other [5, 1.80%] for ZIP Code 21667 in Still Pond, MD. Load Chart

Source: U.S. Census Bureau (2020) DHC

Pie Chart & Table Comparison Chart

Gender Breakdown

Males: The # of Males from the 2020 Census. Each respondent self-identified on the survey, as they were asked to indicate their sex assigned at birth. The number of Males is important for healthcare planning, policy making, social research, and economic planning and development.	156	54.74%
Females: The # of Females from the 2020 Census. Each respondent self-identified on the survey, as they were asked to indicate their sex assigned at birth. The number of Females is important for healthcare planning, policy making, social research, and economic planning and development.	129	45.26%
Median Age: The Average Age of all persons from the 2020 Census. Median age is the middle age of the population. Half the population is older than the avg age and half is younger. Median Age can relate how young or old a geographic region is compared to others.		41.5 years
Male Median Age: The Average Age of all Males from the 2020 Census. The Male Median Age is the actual avg from the 2020 Census. Median Age is the avg age of the population. Half of the population is older and the other half is younger. This is self-reported by individuals when asked about their sex at birth.		40.3 years
Female Median Age: The Average Age of all Females from the 2020 Census. The Female Median Age is the actual avg from the 2020 Census. Median Age is the avg age of the population. Half of the population is older and the other half is younger. This is self-reported by individuals when asked about their sex at birth.		46.1 years

Pie Chart showing population of Males [156, 54.74%] vs Females [129, 45.26%] for 21667 in Still Pond, MD. Load Chart

Source: U.S. Census Bureau (2020) DHC

Population by Age & Gender

Median Age: The Median Age of all people from the 2020 Census. Median age is the middle age of the population. Half the population is older than the average age and half is younger. Median Age can relate how young or old a geographic region is compared to others. 41.5

Male Median Age: The Median Age of all Males from the 2020 Census for this geographic area. The Male Median Age is the actual average from the 2020 Census. Median Age is the average age of the population. Half of the population is older and the other half is younger. This is self-reported by individuals when asked about their sex at birth. 40.3

Female Median Age: The Median Age of all Females from the 2020 Census for this geographic area. The Female Median Age is the actual average from the 2020 Census. Median Age is the average age of the population. Half of the population is older and the other half is younger. This is self-reported by individuals when asked about their sex at birth. 46.1

Line Chart showing the population by Age Group and Gender. One line shows the Total number of people for ZIP 21667 in that age group, another line shows the number of Males for that age group, and the last line shows the number of Females for the given age group. A table also provides the same information below. Load Chart

Source: U.S. Census Bureau (2020) DHC

Group	< 5	5-9	10-14	15-19	20-24	25-29	30-34	35-39	40-44	45-49	50-54	55-59	60-64	65-69	70-74	75-79	80-84	85+
Male	3	4	10	11	12	16	4	16	12	8	11	5	7	16	7	0	12	2
Female	3	1	18	10	7	7	7	6	5	8	1	13	9	11	7	2	2	12
Total	6	5	28	21	19	23	11	22	17	16	12	18	16	27	14	2	14	14

Average Income per Household

Bar Chart showing Average Income per Household and comparing it to the city of Still Pond, Kent County, the State of Maryland, and the United States National Average. Load Chart

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS

Income Estimate Over Time

Line Chart showing Median Income Estimates from 2011 until 2021 for Median Household Income, Median Family Income, Median Nonfamily Income, Median Male Income, and Median Female Income for the 21667 ZIP Code. A table also provides the same information below. Load Chart

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. DP03. SELECTED ECONOMIC CHARACTERISTICS

Income Type	2011	2012	2013	2014	2015	2016	2017	2018	2019	2020	2021	2022	2023
Median Household Income	$82,417	$80,268	$78,438	$60,500	--	--	$90,625	--	$60,750	--	$90,417	--	$61,505
Median Family Income	$152,604	$86,786	$85,481	$83,750	--	--	$91,625	--	$86,563	$66,250	$90,139	$69,500	$61,531
Median NonFamily Income	$52,727	$53,984	$54,141	$22,250	--	--	--	--	--	--	--	--	--
Median Male Income	$63,929	$62,891	$53,516	$52,813	--	$31,827	--	$78,092	--	--	$76,563	$82,829	--
Median Female Income	$59,063	$57,955	$60,294	$61,087	--	$99,545	$100,729	--	--	--	--	--	$38,648

Average House Value

Bar Chart showing Average House Value for the 21667 ZIP Code and comparing it to the city of Still Pond, Kent County, the State of Maryland, and the United States National Average. Load Chart

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS

Population Estimate Over Time

Line Chart showing Population Estimates from 2011 until 2021 for ZIP Code 21667 with Decennial U.S. Census lines for 2010 and 2020 actual populace. A table also provides the same information. Load Chart

Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. DP05. DEMOGRAPHIC AND HOUSING ESTIMATES

Group	2010	2011	2102	2013	2014	2015	2016	2017	2018	2019	2020	2021	2023	2023
Population Estimate	--	227	194	216	239	240	266	266	235	292	255	226	218	276
Decennial Census	310	--	--	--	--	--	--	--	--	--	285	--	--	--

Pie Chart & Table Comparison Chart

Employment Status

Employed: Employed includes all civilians 16 years old and over who were either (1) "at work" -- those who did any work at all during the reference period as paid employees, worked in their own business or profession, worked on their own farm, or worked 15 hours or more as unpaid workers on a family farm or in a family business; or (2) were "with a job but not at work" -- those who did not work during the reference period but had jobs or businesses from which they were temporarily absent due to illness, bad weather, industrial dispute, vacation, or other personal reasons.	181	70.16%
Unemployed: All civilians 16 years old and over are classified as unemployed if they (1) were neither "at work" nor "with a job but not at work" during the reference period, and (2) were actively looking for work during the last 4 weeks, and (3) were available to accept a job. Also included as unemployed are civilians who did not work at all during the reference period, were waiting to be called back to a job from which they had been laid off, and were available for work except for temporary illness.	9	3.49%
Not In Labor Force: Not in labor force includes all people 16 years old and over who are not classified as members of the labor force. This category consists mainly of students, housewives, retired workers, seasonal workers interviewed in an off season who were not looking for work, institutionalized people, and people doing only incidental unpaid family work (less than 15 hours during the reference period).	68	26.36%

Pie Chart showing Employment Status for those Employed, Unemployed, and Not In the Labor Force. A table also provides the same information. Load Chart

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS

Gross Rent Paid

Less than $500: Gross rent is the monthly rent plus the estimated average monthly cost of utilities (electricity, gas, water and sewer) and fuels (oil, coal, kerosene, wood, etc.) fuels. This shows the number of renter-occupied units paying cash rent (excluding one-family houses on ten or more acres) and percentage which paid under $500 per month.	0	0.00%
$500 to $999: Gross rent is the monthly rent plus the estimated average monthly cost of utilities (electricity, gas, water and sewer) and fuels (oil, coal, kerosene, wood, etc.). This shows the number of renter-occupied units paying cash rent (excluding one-family houses on ten or more acres) and percentage which paid between $500 to $999 per month.	0	0.00%
$1,000 to $1,499: Gross rent is the monthly rent plus the estimated average monthly cost of utilities (electricity, gas, water and sewer) and fuels (oil, coal, kerosene, wood, etc.). This shows the number of renter-occupied units paying cash rent (excluding one-family houses on ten or more acres) and percentage which paid between $1,000 to $1,499 per month.	8	50.00%
$1,500 to $1,999: Gross rent is the monthly rent plus the estimated average monthly cost of utilities (electricity, gas, water and sewer) and fuels (oil, coal, kerosene, wood, etc.). This shows the number of renter-occupied units paying cash rent (excluding one-family houses on ten or more acres) and percentage which paid between $1,500 to $1,999 per month.	0	0.00%
$2,000 to $2,499: Gross rent is the monthly rent plus the estimated average monthly cost of utilities (electricity, gas, water and sewer) and fuels (oil, coal, kerosene, wood, etc.). This shows the number of renter-occupied units paying cash rent (excluding one-family houses on ten or more acres) and percentage which paid between $2,000 to $2,499 per month.	0	0.00%
$2,500 to $2,999: Gross rent is the monthly rent plus the estimated average monthly cost of utilities (electricity, gas, water and sewer) and fuels (oil, coal, kerosene, wood, etc.). This shows the number of renter-occupied units paying cash rent (excluding one-family houses on ten or more acres) and percentage which paid between $2,500 to $2,999 per month.	0	0.00%
$3,000 or more: Gross rent is the monthly rent plus the estimated average monthly cost of utilities (electricity, gas, water and sewer) and fuels (oil, coal, kerosene, wood, etc.). This shows the number of renter-occupied units paying cash rent (excluding one-family houses on ten or more acres) and percentage which paid $3,000 or more per month.	0	0.00%
No Rent: Gross rent is the monthly rent plus the estimated average monthly cost of utilities (electricity, gas, water and sewer) and fuels (oil, coal, kerosene, wood, etc.). This shows the number of renter-occupied units paying cash rent (excluding one-family houses on ten or more acres) and percentage which pay no rent per month.	8	50.00%

Pie Chart showing Gross Rent Paid by renters in the 21667 ZIP Code. A table also provides the same information. Load Chart

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table Table DP04. SELECTED HOUSING CHARACTERISTICS

Pie Chart & Table Comparison Chart

Health Insurance

Private Insurance: Census Estimate of the Civilian noninstitutionalized people with private health insurance. Private health insurance is a plan provided through an employer or union; a plan purchased by an individual from an insurance company; or TRICARE or other military health coverage.	161	52.44%
Public Insurance: Census Estimate of the Civilian noninstitutionalized people with public health insurance. Public coverage includes the federal programs Medicare, Medicaid and other medical assistance programs, VA and CHAMPVA Health Care; the Children’s Health Insurance Program (CHIP); and individual state health plans. The ACS questionnaire does not specifically ask about these types of coverage, but respondents who indicate these types of coverage are counted as having public coverage.	138	44.95%
No Insurance: Census Estimate of the Civilian noninstitutionalized people with no health insurance of any kind. People whose only health coverage is Indian Health Service are uninsured as IHS is not considered comprehensive coverage.	8	2.61%

Pie Chart showing Civilian noninstitutionalized people with Private, Public, or No Health Insurance coverage for individuals in this geographic area. A table also provides the same data. Load Chart

Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS

Other Demographics

# Residential Mailboxes: The number of active residential delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	109
# Business Mailboxes: The number of active business delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	6
Total Delivery Receptacles: The total number of delivery receptacles. This includes curb side mailboxes, centralized units, PO Boxes, NDCBU, and contract boxes. This for Residential and Business combined.	1,074
Single Family Delivery Units: Total of single family mail delivery receptacles; generally analogous to homes.	109
Multi Family Delivery Units: Total of multifamily mail delivery receptacles; generally analogous to apartments.	0

# of Businesses: The total number of Business Establishments. Taken from Business Census 2023.	3
1st Quarter Payroll: The total payroll for the first quarter. Taken from Business Census 2023.	$148,000
Annual Payroll: The total annual payroll. Taken from Business Census 2023.	$884,000
# of Employees: The total number of employees. Taken from Business Census 2023.	21

21667 ZIP Code Geography & Statistical Areas

CBSA Name: Name of the Core Based Statistical Area . A Core Based Statistical Area is the official term for a functional region based around an urban center of at least 10,000 people, based on standards published by the Office of Management and Budget (OMB) in 2000. These standards are used to replace the definitions of metropolitan areas that were defined in 1990. A CBSA is broken into two sub categories, Metro and Micro, and are detailed in the CBSA Type Field. These are defined by their population densities. To be considered a Micro area, population must be between 10,000 and 50,000. To be considered a Metro area, population must exceed 50,000.	--
CBSA Number: Core Based Statistical Area (replaces old MSA's). A Core Based Statistical Area is the official term for a functional region based around an urban center of at least 10,000 people, based on standards published by the Office of Management and Budget (OMB) in 2000.	--
CBSA Type: Indication of whether a CBSA is Metro (over 50,000 people) or Micro (10,000 - 50,000 people).	--
CBSA Division: Name of the Core Based Statistical Area Division. A metropolitan statistical area containing an urbanized region of at least 2.5 million people can be subdivided into two or more 'metropolitan divisions', provided specified criteria are met. Metropolitan divisions are conceptually similar the primary metropolitan statistical areas (PMSAs) defined under previous standards. This field gives the sub-divided region name	--
CBSA Population: The estimated number of people for the selected CBSA. Source: Table DP-1: Profile of General Population and Housing Characteristics: 2010. 2010 Census Summary File 1.	0
MSA: Metropolitan Statistical Area Description Name. MSA's were replaced by CBSA's in the 90's. We keep the old MSA's in our data because some of our older customers have mapped their data by this information.
Land Area: The approximate amount of land area covered by this ZIP Code in Square Miles.	6.975 sq mi
Water Area: The approximate amount of water area covered by this ZIP Code in Square Miles.	0.381 sq mi

Congressional District: The 119th Congressional District comes from the Census for congressional districts of the 119th Congress. This field shows which districts the ZIP Code belongs to.	01
Congressional Land Area: This field provides the approximate land area covered by the Congressional District for which the ZIP Code belongs to.	3977.06 sq mi
PMSA: Primary Metropolitan Statistical Area. This is the region that the Census Bureau designates as the 'primary' region within a given MSA.
Intro Date: The date this ZIP Code was introduced by the USPS into service. It is in the form of YYYY-MM. In cases where the actual date is unknown, it will be preceded by a < to indicate 'Before this date'.	< 2004-10
Place FIPS Code: FIPS codes, or Federal Information Processing Standards, are numeric codes that uniquely identify geographic areas. The National Institute of Standards and Technology (NIST) assigns FIPS codes. The number of digits in a FIPS code varies depending on the level of geography. This is the 7 digit FIPS Code for the Place that this record covers (if known).	2475150
Place FIPS: FIPS codes, or Federal Information Processing Standards, are numeric codes that uniquely identify geographic areas. The National Institute of Standards and Technology (NIST) assigns FIPS codes. The number of digits in a FIPS code varies depending on the level of geography. This is the name of the FIPS for the Place that this record covers (if known).	Still Pond CDP; Maryland

Adjacent & Nearby 21667 ZIP Codes

21610: Betterton, MD
21678: Worton, MD
21645: Kennedyville, MD
21919: Earleville, MD
21628: PO BOX
21620: Chestertown, MD
21930: PO BOX
21635: Galena, MD
21005: Aberdeen Proving Ground, MD
21913: PO BOX
21651: Millington, MD
21130: PO BOX
21650: Massey, MD
21010: Gunpowder, MD
21001: Aberdeen, MD
21912: Warwick, MD
21017: Belcamp, MD
21668: Sudlersville, MD
21040: Edgewood, MD
21902: PO BOX

Next: 21668 21666: Previous

Schools in ZIP Code 21667

We could not locate which school district ZIP Code 21667 belongs to, but we will update this once updated district data is released. There are no public schools nor private schools with a mailing address in the 21667 ZIP Code, but we have located several schools which are nearby. ZIP Code 21667 also has 6 universities, colleges or post secondary education institutions nearby which would be a short commute to.

Kent County High
25301 Lambs Meadow Rd
Worton, MD 21678
District: Kent County Public Schools (nearby)

Kent County Middle School
402 E Campus Avenue
Chestertown, MD 21620
District: Kent County Public Schools (nearby)

H. H. Garnett Elementary
320 Calvert St
Chestertown, MD 21620
District: Kent County Public Schools (nearby)

Galena Elementary School
114 S Main Street
Galena, MD 21635
District: Kent County Public Schools (nearby)

Rock Hall Elementary
21203 Sharp St
Rock Hall, MD 21661
District: Kent County Public Schools (nearby)

Friendship Montessori School
25528 Worton Lynch Rd
Worton, MD 21678
District: Private School (nearby)

Chestertown Christian Academy
401 Morgnec Rd
Chestertown, MD 21620
District: Private School (nearby)

Radcliffe Creek School
201 Talbot Blvd Ste A
Chestertown, MD 21620
District: Private School (nearby)

Colleges & Post Secondary Schools near ZIP Code 21667

Washington College
300 Washington Ave
Chestertown, MD 21620-1438
Type: Post Secondary

Harford Community College
401 Thomas Run Rd
Bel Air, MD 21015-1698
Type: Post Secondary

Aveda Institute-Maryland
227 Archer St
Bel Air, MD 21014-3639
Type: Post Secondary

Cecil College
One Seahawk Drive
North East, MD 21901-1900
Type: Post Secondary

Strayer University-White Marsh Campus
9920 Franklin Square Drive
Baltimore, MD 21236
Type: Post Secondary

Cecil College - Elkton Station
107 Railroad Avenue
Elkton, MD 21921-5535
Type: Post Secondary

References

U.S. Postal Service [Last Updated: 7/1/2025], https://www.usps.com
ZIP-Codes.com Internal Data Creation [Last Updated: 7/1/2025], https://www.zip-codes.com
U.S. Geological Survey [Updated as needed], https://www.usgs.gov
U.S. Census [Updated Yearly], https://www.census.gov
U.S. Census American National Standards Institute (ANSI) [Last Updated: 7/1/2025], https://www.census.gov
U.S. Census 2020 [Decennial] [Last Updated: 5/25/2023], https://www.census.gov
Centers for Medicare & Medicaid Services [Updated Yearly], https://www.cms.gov
National Center for Education Statistics [Last Updated: 7/1/2025], https://nces.ed.gov