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Data Last Updated: May 1, 2025
All ZIP Codes, Map and Demographics of Greenwich, CT
| ZIP Codes: Greenwich, CT has 3 ZIPs assigned to it by the U.S. Postal Service. This includes 2 Standard, 1 PO Box, and 0 Unique types. Usually, PO Boxes are located inside Post Office locations, but can include standard street delivery addresses. Unique ZIPs are assigned to businesses, government agencies, military, universities, and other entities which receive a large volume of mail. | 2 Standard, 1 PO Box [See All] |
| Planning Region: The County, Parish, Borough, or Planning Region that ZIPs in Greenwich, CT at least partially reside in. These can be completely inside the County, or they can cross into several Counties. | Western Ct Planning Region, CT |
| Area Codes: Telephone Area Codes that are associated with Greenwich, CT. These are used in the North American Numbering Plan (NANP) to facilitate phone routing. | 203, 475 |
| Time Zone: Time zone designation. Please note that not all areas in the U.S. observe daylight saving time which can affect actual local time. | Eastern (GMT -05:00) |
| Local Time: The current local time for Greenwich, CT. If more than 1 time zone for this area, all local times will be shown. Keep in mind that areas can cross time zones, so more than 1 may be shown. | 12:00:00 AM |
| Census Place Population: The number of people in Greenwich CDP; Connecticut from the U.S. Census 2020 Place Data. Included are U.S. Citizens, permanent residents, temporary migrants, and undocumented individuals. The total represents people who live in the area, not just those present while the Census was being completed. This only includes population for the incorporated limits of this place and not individuals from the greater area. | 13,836 [More Details] |
| Population of ZIP Codes: The number of people in all 3 ZIPs which make up the greater Greenwich, CT area. City/Town Limits have unique defined geography boundaries, but areas outside of those limits are still considered a part of the greater area. The USPS assigns each ZIP a name and the Census provides data for each. | 40,297 [More Details] |
| Statistical Area: A Core Based Statistical Area (CBSA) is the recognized term for a region that functions around an urban core with a population of at least 10,000 people, according to the standards set by the Office of Management and Budget (OMB). | Bridgeport-Stamford-Danbury, CT |
| Coordinates: The latitude/longitude centroid coordinates for this area. | 41.0758, -73.6485 |
| Land Area: The approximate amount of land area covered by all ZIPs for Greenwich, CT in square miles. The Land Area is based on geographic boundaries that include the mainland, islands, inland, coastal, Great Lakes, and territorial waters associated with each geography. | 41.09 sq miles (ZIP Codes) |
| Quick Link: Copy the direct link to the Greenwich, CT page and use anywhere you like! |  https://www.zip-codes.com/city/ct-greenwich.asp |
In the United States, a county equivalent is a political or administrative subdivision of a state. It has a specific geographic area and some level of governmental authority. The term "county" is used in 47 states. Alaska, Louisiana, and Connecticut have functionally equivalent subdivisions called Boroughs, Parishes, and Planning Regions, respectively. They functionally act like counties by subdividing the state. Read More about Connecticut Planning Regions: Connecticut changes from Counties to Planning Regions, including a ZIP Code to Historical County Crosswalk file.
Greenwich, CT Demographic Profile
Education
Bachelor's Degree or Higher
69.21%
Important Greenwich, CT Information
Greenwich, CT has 2 Standard (Non-Unique) and 1 PO Box ZIP Codes. Together, these cover a total of 41.09 square miles of land area and 5.31 square miles of water area.This includes the Belle Haven and Glenvilleareas. A full list of ZIP Codes is below, including type, population and aliases for each.
The combined population for all ZIP Codes in Greenwich, CT is 40,297. Population Density is 982.85 persons per square mile. Average Household Size is 2.59 persons and Average Family Size is 2.91 persons. The Census Designated Place population for Greenwich CDP; Connecticut is 13,836. More Demographics are available below, including charts showing racial comparison, gender breakdown, population over time, average income, average house value, income over time, and more.
Western Ct Planning Region is the only county which covers this area. There are 2 area codes serving this area including203 and 475. Greenwich is also located in the Eastern (GMT -05:00) timezone and the current local time is shown above.
Greenwich is part of the Bridgeport-Stamford-Danbury, CT Core Based Statistical Area (CBSA). Its CBSA Code is 14860.It is classified as a metro area, which means the combined population is 50,000 or more (at its core).
CBSAs are defined by the OMB as geographic areas that have at least one core with a population of 10,000 or more (for a micro area) and adjacent territory with a high degree of social and economic integration. CBSA codes are commonly used to accurately file Medicare claims and to verify applicable incentives using a patient's ZIP Code.
ZIP Codes in Greenwich, CT have 16,151 Residential mailboxes and 1,778 Business mailboxes.There are 1,950 businesses with a total of 25,236 employees. That is an average of 12.9 employees per business. Annual payroll for these businesses is $4,696,111,000. Other Demographics
Greenwich, CT has 3 ZIP Codes
| ZIP Code | Type | Population | % of Population | Alias Names |
|---|---|---|---|---|
| 06830 | Standard | 25,043 | 62.15% | Belle Haven |
| 06831 | Standard | 15,254 | 37.85% | Glenville |
| 06836 | P.O. Box | 0 | 0.00% |
Greenwich, CT Demographic Information
There are two kinds of demographics shown in the charts for Greenwich, CT. Each covers a different geographic boundary and has different criteria for what is included. Learn More
| Total Population: Total number of people from the 2020 U.S. Census for all ZIPs in Greenwich, CT. This reflects the exact count of this area 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. | 40,297 |
| Total Households: Total number of Households from the 2020 U.S. Census for all ZIPs in Greenwich, CT. A Household includes everyone living in a residential housing unit. This includes families, roommates in a single residence, or a person living alone. | 15,356 |
| Total Housing Units: The total number of Housing Units is the number of occupied units + the number of vacant units. Ownership is defined by whether the unit is occupied by an owner or by a tenant. Owner occupancy means that the owner lives in the unit. This value comes from the 2020 U.S. Census and is not a projection or estimate. | 17,213 |
| Average Household Size: The Average Household Size, is obtained by dividing the number of people in Households (excluding those in group quarters, nursing home, prisons, and dorm rooms) by the number of Households. A Household includes everyone living in a residential unit. Those who do not live in a household are classified as living in group accommodation. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly. | 2.59 |
| 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 Average Family Size only looks at the households classified as Family Households. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly. | 2.91 |
All ZIP Codes assigned this City name by the USPS.
| Total Population: Total number of people from the 2020 Census. This reflects the exact count of the Census Place 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. | 13,836 |
| Total Households: Total number of Households from the 2020 U.S. Census. A Household includes everyone living in a residential housing unit. This includes families, roommates in a single residence, or a person living alone. | 5,994 |
| Total Housing Units: The total number of Housing Units is the number of occupied units + the number of vacant units. Ownership is defined by whether the unit is occupied by an owner or by a tenant. Owner occupancy means that the owner lives in the unit. This value comes from the 2020 U.S. Census and is not a projection or estimate. | 6,771 |
| Average Household Size: The Average Household Size, is obtained by dividing the number of people in Households (excluding those in group quarters, nursing home, prisons, and dorm rooms) by the number of Households. A Household includes everyone living in a residential unit. Those who do not live in a household are classified as living in group accommodation. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly. | 2.29 |
| 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 Average Family Size only looks at the households classified as Family Households. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly. | 3.09 |
Data for the U.S. Census Place.
Population by Race
| White: The number of individuals who selected White as their race is an exact count from the 2020 Census for this geographic area. On the 2020 U.S. Census questionnaire, people were asked to check all races which applied to them, including White. This count includes all who selected White/Caucasian in their response, even if they selected another race as well. | 29,470 | 70.20% |
| Black: The number of individuals who selected Black as their race is an exact count from the 2020 Census for this geographic area. On the 2020 U.S. Census questionnaire, people were asked to check all races which applied to them, including Black or African American. This count includes all who selected Black or African American in their response, even if they selected another race as well. | 1,003 | 2.39% |
| Hispanic: The number of individuals who selected Hispanic is an exact count from the 2020 Census for this geographic area. 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 count 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. | 5,962 | 14.20% |
| Asian: The number of individuals who selected Asian as their race is an exact count from the 2020 Census for this geographic area. 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 count includes all who selected one of these options in their response, even if they selected another race as well. | 2,705 | 6.44% |
| American Indian: The number of individuals who selected American Indian and Alaska Native as their race is an exact count from the 2020 Census for this geographic area. 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 count includes all who selected American Indian and Alaska Native in their response, even if they selected another race as well. | 101 | 0.24% |
| Hawaiian: The number of individuals who selected Hawaiian or Pacific Islander as their race is an exact count from the 2020 Census for this geographic area. 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 count includes all who selected either Hawaiian or Pacific Islander in their response, even if they selected another race as well. | 19 | 0.05% |
| Other: The number of individuals who selected Other as their race on the 2020 Census. On the 2020 U.S. Census questionnaire, people were asked to check all races which applied to them, and this includes all individuals who did not select one of the races above. | 2,721 | 6.48% |
All ZIP Codes assigned this City name by the USPS.
Source: U.S. Census Bureau (2020) DHC
Gender Breakdown
| Males: The # of Males from the 2020 Census. This is not a forecast for the future, but an exact count for this geographic area at the time of the Census. Each respondent self-identified their gender on the survey, as they were asked to indicate their gender assigned at birth. This information is important for healthcare planning, policy making, social research, and economic planning and development. | 19,103 | 47.41% |
| Females: The # of Females from the 2020 Census. This is not a forecast for the future, but an exact count for this geographic area at the time of the Census. Each respondent self-identified their gender on the survey, as they were asked to indicate their gender assigned at birth. This information is important for healthcare planning, policy making, social research, and economic planning and development. | 21,194 | 52.59% |
| Median Age: The Median Age of all persons from the 2020 Census for this geographic area. Median age is the middle age of the population. Half the people are older than the average age and half area younger. Median Age can relate how young or old a geographic area is compared to others. | 30.1 years | |
| 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, not an estimate or future projection. Median Age is the average age of the population. Half of the population is older and the other half is younger. Gender is self-reported by individuals when asked about their sex at birth. | 28.8 years | |
| 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, not an estimate or future projection. Median Age is the average age of the population. Half of the population is older and the other half is younger. Gender is self-reported by individuals when asked about their sex at birth. | 31.1 years |
All ZIP Codes assigned this City name by the USPS.
Source: U.S. Census Bureau (2020) DHC
Population by Age & Gender
Median Age: The Median Age of the Total Population from the 2020 Census for this geographic area. Median age is the middle age of the population. Half the people area older than the average age and half are younger. Median Age can relate how young or old a geographic area is compared to others. 30.1
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, not an estimate or future projection. Median Age is the average age of the population. Half of the population is older and the other half is younger. Gender is self-reported by individuals when asked about their sex at birth. 28.8
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, not an estimate or future projection. Median Age is the average age of the population. Half of the population is older and the other half is younger. Gender is self-reported by individuals when asked about their sex at birth. 31.1
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 | 973 | 1,160 | 1,415 | 1,452 | 1,081 | 815 | 905 | 1,054 | 1,184 | 1,195 | 1,456 | 1,479 | 1,381 | 1,122 | 835 | 637 | 467 | 492 |
| Female | 933 | 1,083 | 1,333 | 1,302 | 1,156 | 884 | 999 | 1,203 | 1,294 | 1,441 | 1,702 | 1,736 | 1,603 | 1,207 | 1,051 | 789 | 611 | 867 |
| Total | 1,906 | 2,243 | 2,748 | 2,754 | 2,237 | 1,699 | 1,904 | 2,257 | 2,478 | 2,636 | 3,158 | 3,215 | 2,984 | 2,329 | 1,886 | 1,426 | 1,078 | 1,359 |
Average Income per Household
Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS
Income Estimate Over Time
Source: U.S. Census 2011-2023 American Community Survey 5-Year Estimates. DP03. SELECTED ECONOMIC CHARACTERISTICS
| Income Type | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Household Income | $117,201 | $119,034 | $119,967 | $127,447 | $120,764 | $122,492 | $124,005 | $132,333 | $143,460 | $166,868 | $170,168 | $177,910 | $146,841 |
| Median Family Income | $159,612 | $151,979 | $152,069 | $157,872 | $150,005 | $152,517 | $161,086 | $164,672 | $183,263 | $195,878 | $202,828 | $208,049 | $198,636 |
| Median NonFamily Income | $64,863 | $68,303 | $67,395 | $66,914 | $64,453 | $59,597 | $55,310 | $56,295 | $60,995 | $78,062 | $73,904 | $79,943 | $92,008 |
| Median Male Income | $109,027 | $110,045 | $111,088 | $115,182 | $108,820 | $113,119 | $123,008 | $125,831 | $143,276 | $151,806 | $148,466 | $152,551 | $175,119 |
| Median Female Income | $63,547 | $64,310 | $65,895 | $68,009 | $67,666 | $69,575 | $71,922 | $74,528 | $79,189 | $77,209 | $83,982 | $79,625 | $74,603 |
Average House Value
Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS
Population Estimate Over Time
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 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Population Estimate | -- | 38,786 | 38,841 | 39,389 | 40,185 | 39,942 | 39,916 | 40,263 | 39,876 | 39,624 | 39,797 | 39,960 | 39,562 | 39,575 |
| Decennial Census | 38,819 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 40,297 | -- | -- | -- |
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. | 18,889 | 59.07% |
| 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. | 1,301 | 4.07% |
| 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). | 11,785 | 36.86% |
All ZIP Codes assigned this City name by the USPS.
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. | 252 | 4.75% |
| $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. | 426 | 8.03% |
| $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. | 342 | 6.44% |
| $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. | 870 | 16.39% |
| $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. | 729 | 13.73% |
| $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. | 399 | 7.52% |
| $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. | 1,971 | 37.13% |
| 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. | 319 | 6.01% |
All ZIP Codes assigned this City name by the USPS.
Source: U.S. Census 2019-2023 American Community Survey 5-Year Estimates. Table Table DP04. SELECTED HOUSING CHARACTERISTICS
Health Insurance
| Private Insurance: Census Estimate of the Civilian non-institutionalized people with private health insurance for all ZIPs. 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. | 31,286 | 70.98% |
| Public Insurance: Census Estimate of the Civilian non-institutionalized people with public health insurance for all ZIPs. 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. | 11,007 | 24.97% |
| No Insurance: Census Estimate of the Civilian non-institutionalized people with no health insurance of any kind for all ZIPs. People whose only health coverage is Indian Health Service are uninsured as IHS is not considered comprehensive coverage. | 1,787 | 4.05% |
All ZIP Codes assigned this City name by the USPS.
Source: U.S. Census 2017-2021 American Community Survey 5-Year Estimates. Table DP03. SELECTED ECONOMIC CHARACTERISTICS
Other Greenwich Demographics
| # Residential Mailboxes: The number of active residential delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types. | 16,151 |
| # Business Mailboxes: The number of active business delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types. | 1,778 |
| Total Delivery Receptacles: The total number of delivery receptacles. This includes curb side mailboxes, centralized units, PO Boxes, NDCBU, and contract boxes. This count is for Residential and Business combined. | 19,802 |
| Single Family Delivery Units: Total count of single family mail delivery receptacles; generally analogous to homes. | 13,215 |
| Multi Family Delivery Units: Total count of multifamily mail delivery receptacles; generally analogous to apartments. | 1,963 |
| # of Businesses: The total number of Business Establishments. Data taken from Business Census 2023. | 1,950 |
| 1st Quarter Payroll: The total payroll for the first quarter. Data taken from Business Census 2023. | $1,710,263,000 |
| Annual Payroll: The total annual payroll . Data taken from Business Census 2023. | $4,696,111,000 |
| # of Employees: The total number of employees for all ZIP Codes in this City. Data taken from Business Census 2023. | 25,236 |
All ZIP Codes assigned this City name by the USPS.
Cities near Greenwich, CT
- Cos Cob, CT (~3.24 miles)
- Port Chester, NY (~3.95 miles)
- Riverside, CT (~4.41 miles)
- Purchase, NY (~4.45 miles)
- West Harrison, NY (~4.58 miles)
- Armonk, NY (~4.61 miles)
- Old Greenwich, CT (~5.04 miles)
- Stamford, CT (~5.09 miles)
- White Plains, NY (~6.77 miles)
- Thornwood, NY (~6.92 miles)
- Valhalla, NY (~7.13 miles)
- Rye, NY (~7.20 miles)
- Harrison, NY (~7.65 miles)
- Bedford, NY (~7.76 miles)
- Pleasantville, NY (~8.24 miles)
- Hawthorne, NY (~8.36 miles)
- Darien, CT (~8.70 miles)
- Elmsford, NY (~8.98 miles)
- Mount Kisco, NY (~9.31 miles)
- Chappaqua, NY (~9.31 miles)
References
- U.S. Postal Service [Last Updated: 5/1/2025], https://www.usps.com
- ZIP-Codes.com Internal Data Creation [Last Updated: 5/1/2025], 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 2020 [Decennial] [Last Updated: 5/25/2023], https://www.census.gov
