| City: | Glyndon, Maryland |
| County: | Baltimore County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 9:58:43 PM |
| Population: | 619 [See All] |
| Area Codes: | 410 / 443 |
| Classification: | PO Box |
| Coordinates: | 39.4732, -76.8152 |
| Land Area: | 1.501 sq mi |
| Quick Link: |
Glyndon is a small, affluent community in Baltimore County, Maryland, covering just 0.12 square miles. With 619 residents and 241 households, this compact area sits within the Baltimore metro area, less than a mile from Reisterstown. The community is designated as a PO Box Only Zone, meaning residents don't have the option of standard street delivery even though the ZIP includes some carrier routes for businesses and multi-unit buildings.
The Glyndon post office maintains 182 PO Boxes for 241 households, resulting in a 76% adoption rate. This near-universal reliance on PO Boxes isn't by choice. It's the only way residents can receive mail. Despite the PO Box Only designation, the ZIP does include limited street delivery (21 city carrier records and 39 rural carrier records), primarily serving businesses along Railroad Avenue and Butler Road.
This is an established, well-educated community with a median household income of $138,456 and a median home value of $451,800. Among residents 25 and older, 67.5% hold bachelor's degrees or higher. The median age is 45.0 years. Homeownership dominates, with 97% of occupied housing units owner-occupied (233 of 241 homes). Many homes date to the early 20th century, with 115 housing units built before 1939.
The street network includes 10 named streets, led by Railroad Avenue (25 delivery records), Butler Road (13 records with business suites), and Central Avenue (10 records). Historic street names like Chatsworth Avenue, Belle View Avenue, and Glyndon Manor Lane hint at the community's long-standing residential character. The area also supports 32 business establishments employing 581 workers, suggesting a small commercial district serving the local area.
All residential mail must be addressed to a PO Box at Glyndon, MD 21071. Street addresses are used for some business deliveries but are not available for residential mail.
Street names centered on Railroad Avenue suggest historic railroad community origins, with residential avenues named for estates and manor homes.
ZIP Code 21071 has 619 residents and 241 households (average 2.57 persons per household). The median age is 45.0 years, older than the state (38.8) and older than the nation (38.8). The gender split is 51.5% male and 48.5% female, which is higher than the state male share (48.2%), making this a male-majority area. Largest groups are White (79.0%, much higher than the state average of 48.7% and well above the national average of 61.6%) and Black or African American (6.6%, much lower than the state average of 29.5%); Hispanic or Latino residents make up 5.3%, which is much lower than the national average (18.7%).
Explore More: Population Over Time By Age & Gender By Race By Gender Nativity & Citizenship
| 2020 Population: | 619Source: Census DHC |
| 2024 ACS Population Estimate: | 404Source: Census ACS |
| 2026 ZC Population Estimate: | 0Source: ZIP-Codes.com |
| Population Density: | 412.4 people per sq mile |
| Average Income: | $213,500Source: Census ACS |
| Households: | 241Source: Census DHC |
| Average House Value: | $450,500Source: Census ACS |
| Persons Per Household: | 2.57Source: Census DHC |
| Average Family Size: | 2.65Source: Census ACS |
| Group | 2010 | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Census ACS Population Estimate | -- | 247 | 275 | 454 | 541 | 615 | 621 | 514 | 595 | 581 | 454 | 463 | 526 | 355 | 404 |
| Decennial Census | 497 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 619 | -- | -- | -- | -- |
Median Age: 45
Male Median Age: 46.1
Female Median Age: 42
| 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 | 32 | 4 | 14 | 21 | 9 | 20 | 25 | 13 | 17 | 18 | 35 | 15 | 24 | 23 | 17 | 23 | 7 | 2 |
| Female | 14 | 17 | 16 | 17 | 21 | 18 | 19 | 13 | 20 | 14 | 27 | 38 | 30 | 9 | 21 | 2 | 1 | 3 |
| Total | 46 | 21 | 30 | 38 | 30 | 38 | 44 | 26 | 37 | 32 | 62 | 53 | 54 | 32 | 38 | 25 | 8 | 5 |
| White: | 489 | 79.64% |
| Black: | 41 | 6.68% |
| Hispanic:* | 33 | 5.37% |
| Asian: | 26 | 4.23% |
| American Indian: | 1 | 0.16% |
| Hawaiian: | 0 | 0% |
| Other: | 24 | 3.91% |
| Total: | 614 | 100% |
| Gender | Count | % | Median Age |
|---|---|---|---|
| Males: | 319 | 51.53% | 46.1 years |
| Females: | 300 | 48.47% | 42.0 years |
| Total: | 619 | 100% | 45.0 years |
| Native, born in the United States: | 395 | 97.77% |
| Native, born in PR, Island Areas, or abroad: | 0 | 0.00% |
| Foreign born, naturalized U.S. citizen: | 9 | 2.23% |
| Foreign born, not a U.S. citizen: | 0 | 2.23% |
| Total Population: | 404 | 100% |
| Total Native Population: | 395 | 97.77% |
| Total Foreign-born Population: | 9 | 2.23% |
In 2024, the Median household income is $213,500, which is considerably higher than the national median ($78,538), is up $147,875 (225.3%) since 2011 and above its 2019 pre-pandemic level by $10,844. Family households earn a median of $214,667 versus $0 for nonfamily households (a difference of $214,667). By gender, male median income is $0 and female is $102,869, which is markedly greater than the national female median ($53,445), with a current gap of $102,869 that has narrowed from 2011 to 2024. The labor-force participation rate is 69.1%, which is above the national rate (63.5%). The unemployment rate is 0.0%, which is markedly below the national rate (5.2%). The largest occupation group is Management (78.9%).
Explore More: Income Over Time Household Income Employment Status By Occupation
| Income Type | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Household Income | $65,625 | $54,219 | $95,156 | $97,829 | $99,886 | $0 | $159,318 | $0 | $202,656 | $103,750 | $0 | $0 | $138,456 | $213,500 |
| Median Family Income | $80,729 | $107,679 | $205,284 | $153,125 | $154,125 | $205,703 | $209,609 | $202,337 | $215,313 | $178,281 | $0 | $232,813 | $139,559 | $214,667 |
| Median NonFamily Income | $14,079 | $40,769 | $40,625 | $41,333 | $0 | $40,428 | $0 | $30,571 | $30,357 | $0 | $0 | $0 | $0 | $0 |
| Median Male Income | $66,181 | $65,238 | $81,875 | $98,056 | $0 | $105,917 | $195,096 | $110,938 | $0 | $50,500 | $85,542 | $94,732 | $0 | $0 |
| Median Female Income | $95,192 | $42,500 | $0 | $0 | $0 | $32,217 | $0 | $0 | $0 | $57,935 | $85,046 | $93,516 | $101,635 | $102,869 |
| Employed: | 199 | 69.10% |
| Unemployed: | 0 | 0.00% |
| Not In Labor Force: | 89 | 30.90% |
| Total: | 288 | 100% |
| Management, business, science, and arts: | 157 | 78.89% |
| Service: | 0 | 0.00% |
| Sales and Office: | 42 | 21.11% |
| Natural resources, construction, and maintenance: | 0 | 0.00% |
| Production, transportation, and material moving: | 0 | 0.00% |
| Total Civilian Employed Population: | 199 | 100% |
In 2024, the median home value is $450,500, which is much higher than the national median ($303,400), is up $68,000 (17.78%) since 2011 and above its 2019 pre-pandemic level by $69,500. The median gross rent is $0, which is far less than the state median ($1,662), and above its 2019 pre-pandemic level by $0. Of occupied housing, owners make up 100.00% (76.92% with a mortgage, 23.08% free-and-clear) and renters 0.00% - making this ZIP Code more home ownership than the state and under national rental averages. The vacancy rate is 0.00%, which is much lower than the national rate (10.43%).
Explore More: Compare Home Value Home Value Over Time Rent & Over Time Housing Occupancy
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Home Value | $382,500 | $346,400 | $343,900 | $344,300 | $356,100 | $327,000 | $333,300 | $325,000 | $381,000 | $345,700 | $354,900 | $459,100 | $451,800 | $450,500 |
| Less than $500: | 0 | 0% |
| $500 to $999: | 0 | 0% |
| $1,000 to $1,499: | 0 | 0% |
| $1,500 to $1,999: | 0 | 0% |
| $2,000 to $2,499: | 0 | 0% |
| $2,500 to $2,999: | 0 | 0% |
| $3,000 or more: | 0 | 0% |
| No Rent: | 0 | 0% |
| Total: | 0 | 100% |
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Rent | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Owner Occupied (with mortgage): | 100 | 76.92% |
| Owner Occupied (free and clear, no mortgage): | 30 | 23.08% |
| Renter Occupied: | 0 | 0.00% |
| Total Occupied Housing Units: | 130 | 100% |
| Occupied Housing Units: | 130 | 100.00% |
| Vacant Housing Units (not graphed): | 0 | 0.00% |
| Total Housing Units: | 130 | 100% |
| Single-Family Units: | 130 | 100.00% |
| Multi-Family Units: | 0 | 0.00% |
| Other Units: | 0 | 0.00% |
| Total Housing Units: | 130 | 100% |
In 2024, 83.30% of adults (25+) have a bachelor's degree or higher, which is far higher than the national rate (35.00%), well above both the state and national averages. High school or higher is 100.00%, which is comparable to the national rate (89.40%). The uninsured rate is 0.00%, which is comparable to the national rate (8.60%). Private coverage is 93.30%, which is well above the national rate (67.30%). Public coverage is 17.80%, which is far lower than the national rate (36.30%). The share of people in poverty is 0.00%, which is comparable to the national rate (8.70%). Poverty has been broadly stable, which may reflect structural barriers or offsetting gains and setbacks. Among residents ages 3+, the largest enrollment group is pre-K (52.46%). College enrollment is 14.75%, which is on par with the state rate (28.00%), meaning the community mirrors broader higher-education participation.
Explore More: Educational Attainment Health Insurance Poverty Over Time School Enrollment
| Less than 9th grade: | 0 | 0.00% |
| 9th to 12th grade, no diploma: | 0 | 0.00% |
| High school graduate (includes equivalency): | 33 | 11.46% |
| Some college, no degree: | 15 | 5.21% |
| Associate's degree: | 0 | 0.00% |
| Bachelor's degree: | 100 | 34.72% |
| Graduate or professional degree: | 140 | 48.61% |
| Total: | 288 | 100% |
| High school or higher: | 288 | 100.00% |
| Bachelor's degree or higher: | 240 | 83.33% |
| Private Insurance: | 377 | 83.96% |
| Public Insurance: | 72 | 16.04% |
| No Insurance: | 0 | 0.00% |
| Total: | 449 | 100% |
| Has Health Insurance: | 449 | 100.00% |
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| % of People in Poverty | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% | 0.0% |
Note: Counts of Families & People in poverty are not published at the ZIP Code level due to small sample sizes. Percentages shown are survey estimates from the American Community Survey (ACS). They may differ from official poverty statistics. The U.S. Census Bureau defines poverty status by comparing a family's or individual's total income with federal poverty thresholds that vary by family size and composition.
| Nursery School, Preschool: | 32 | 52.46% |
| Kindergarten: | 0 | 0.00% |
| Elementary school (grades 1-8): | 20 | 32.79% |
| High school (grades 9-12): | 0 | 0.00% |
| College or graduate school: | 9 | 14.75% |
| Total: | 61 | 100% |
| Early Childhood: | 32 | 52.46% |
| K-12 (Primary & Secondary School): | 20 | 32.79% |
ZIP Code 21071 supports both business and residential activity. According to the Business Census (2024), there are 32 business establishments, employing about 606 people with an annual payroll of $35,119,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 251Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 32Source: CBP |
| 1st Quarter Payroll: | $8,829,000Source: CBP |
| Annual Payroll: | $35,119,000Source: CBP |
| # of Employees: | 606Source: CBP |
ZIP Code 21071 is located in Baltimore County, Maryland, within the Baltimore-Columbia-Towson, MD Metropolitan Statistical Area (CBSA 12580) and Maryland's 2nd Congressional District. This Metro area has a population of 2,710,489 people, about 0.02% of whom live in ZIP Code 21071. It covers 1.501 sq mi of land and a water area of 0.002 sq mi.
| CBSA Name: | Baltimore-Columbia-Towson, MDSource: Census |
| CBSA Number: | 12580Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 2,710,489Source: Census |
| MSA: | Washington-Baltimore, DC-MD-VA-WV CMSASource: Census |
| Land Area: | 1.501 sq miSource: Census |
| Water Area: | 0.002 sq miSource: Census |
| Congressional District: | 02Source: USPS |
| Congressional Land Area: | 348.88 sq miSource: Census |
| PMSA: | Baltimore, MD PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | --Source: Census |
| Place Name: | --Source: Census |
We could not locate which school district 21071 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.