| City: | Frederick, Maryland |
| County: | Frederick County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:26:12 AM |
| Population: | 9 [See All] |
| Area Codes: | 227 / 240 / 301 |
| Classification: | PO Box |
| Coordinates: | 39.4142, -77.4105 |
| Land Area: | 0.024 sq mi |
| Quick Link: |
ZIP Code 21705 serves Frederick's downtown post office, a point-only ZIP located within the larger 21701 territory. This isn't a residential area. All 9 people counted by the Census live in group quarters, with 7 in institutionalized settings. The ZIP exists primarily for postal operations, not as a place where people live.
The Frederick post office at this location maintains 477 PO Boxes and serves 486 business delivery points. With 17 business establishments employing 255 workers nearby, this functions as a commercial mail hub for downtown Frederick. E Patrick Street hosts all 96 street-based ZIP+4 records, with unit designations indicating multi-tenant commercial buildings.
Frederick itself is a city of over 80,000 in the Washington-Baltimore metro corridor. Most residents receive mail through standard ZIPs like 21701, 21702, and 21703. ZIP 21705 exists as a dedicated post office ZIP, serving customers who prefer PO Boxes for privacy or business purposes and providing commercial mail services to the downtown business district.
The downtown location sits adjacent to Baker Park, Sagner, and Mount Olivet Heights neighborhoods. While the post office serves these areas, residents there receive carrier delivery through neighboring standard ZIPs. The 477 PO Boxes here serve a mix of downtown businesses, professionals wanting a separate mailing address, and customers from across the Frederick area.
All delivery records point to E Patrick Street, where the downtown post office is located.
ZIP Code 21705 has 9 residents and 0 households. The median age is 22.5 years, significantly younger than the state (38.8) and significantly younger than the nation (38.8). The gender split is 66.7% male and 33.3% female, which is much higher than the state male share (48.2%), making this a male-majority area. Largest groups are White (66.7%, much higher than the state average of 48.7%) and Hispanic or Latino (33.3%); Hispanic or Latino residents make up 33.3%, which is much higher than the state average (11.8%).
Explore More: Population Over Time By Age & Gender By Race By Gender Nativity & Citizenship
| 2020 Population: | 9Source: Census DHC |
| 2024 ACS Population Estimate: | 4Source: Census ACS |
| 2026 ZC Population Estimate: | 0Source: ZIP-Codes.com |
| Population Density: | 375.0 people per sq mile |
| Average Income: | $0Source: Census ACS |
| Households: | 0Source: Census DHC |
| Average House Value: | $0Source: Census ACS |
| Persons Per Household: | 0.00Source: Census DHC |
| Average Family Size: | 0.00Source: Census ACS |
| Group | 2010 | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Census ACS Population Estimate | -- | 2 | 2 | 3 | 4 | 12 | 13 | 0 | 0 | 3 | 4 | 6 | 5 | 4 |
| Decennial Census | 8 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 9 | -- | -- | -- |
Median Age: 22.5
Male Median Age: 26
Female Median Age: 13.5
| 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 | 0 | 0 | 1 | 1 | 0 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Female | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | 0 | 1 | 2 | 1 | 1 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| White: | 6 | 54.55% |
| Black: | 2 | 18.18% |
| Hispanic:* | 3 | 27.27% |
| Asian: | 0 | 0% |
| American Indian: | 0 | 0% |
| Hawaiian: | 0 | 0% |
| Other: | 0 | 0% |
| Total: | 11 | 100% |
| Gender | Count | % | Median Age |
|---|---|---|---|
| Males: | 6 | 66.67% | 26.0 years |
| Females: | 3 | 33.33% | 13.5 years |
| Total: | 9 | 100% | 22.5 years |
| Native, born in the United States: | 4 | 100.00% |
| Native, born in PR, Island Areas, or abroad: | 0 | 0.00% |
| Foreign born, naturalized U.S. citizen: | 0 | 0.00% |
| Foreign born, not a U.S. citizen: | 0 | 0.00% |
| Total Population: | 4 | 100% |
| Total Native Population: | 4 | 100.00% |
| Total Foreign-born Population: | 0 | 0.00% |
In 2023, the Median household income is $0, which is far less than the state median ($101,652), and above its 2019 pre-pandemic level by $0. Family households earn a median of $0 versus $0 for nonfamily households (a difference of $0). By gender, male median income is $0 and female is $0, which is well under the state female median ($68,044), with a current gap of $0 that has stayed about the same from 2011 to 2023. The labor-force participation rate is 33.3%, which is far less than the state rate (67.2%). The unemployment rate is 100.0%, which is much higher than the state rate (4.9%).
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Household Income | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Median Family Income | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Median NonFamily Income | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Median Male Income | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Median Female Income | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 | $0 |
| Employed: | 0 | 0.00% |
| Unemployed: | 1 | 33.33% |
| Not In Labor Force: | 2 | 66.67% |
| Total: | 3 | 100% |
| Management, business, science, and arts: | 0 | 0% |
| Service: | 0 | 0% |
| Sales and Office: | 0 | 0% |
| Natural resources, construction, and maintenance: | 0 | 0% |
| Production, transportation, and material moving: | 0 | 0% |
| Total Civilian Employed Population: | 0 | 100% |
In 2023, 0.00% of adults (25+) have a bachelor's degree or higher, which is on par with the state rate (42.70%). High school or higher is 100.00%, which is comparable to the national rate (89.40%). The uninsured rate is 66.70%, which is on par with the state rate (6.20%). Insufficient data for poverty. Among residents ages 3+, the largest enrollment group is elementary (100.00%). College enrollment is 0.00%, 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): | 3 | 100.00% |
| Some college, no degree: | 0 | 0.00% |
| Associate's degree: | 0 | 0.00% |
| Bachelor's degree: | 0 | 0.00% |
| Graduate or professional degree: | 0 | 0.00% |
| Total: | 3 | 100% |
| High school or higher: | 3 | 100.00% |
| Bachelor's degree or higher: | 0 | 0.00% |
| Private Insurance: | 1 | 25.00% |
| Public Insurance: | 1 | 25.00% |
| No Insurance: | 2 | 50.00% |
| Total: | 4 | 100% |
| Has Health Insurance: | 2 | 50.00% |
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| % of People in Poverty | -666,666,666.0% | -666,666,666.0% | -666,666,666.0% | -666,666,666.0% | -666,666,666.0% | -666,666,666.0% | -666,666,666.0% | -666,666,666.0% | -666,666,666.0% | 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: | 0 | 0.00% |
| Kindergarten: | 0 | 0.00% |
| Elementary school (grades 1-8): | 1 | 100.00% |
| High school (grades 9-12): | 0 | 0.00% |
| College or graduate school: | 0 | 0.00% |
| Total: | 1 | 100% |
| Early Childhood: | 0 | 0.00% |
| K-12 (Primary & Secondary School): | 1 | 100.00% |
ZIP Code 21705 supports both business and residential activity. According to the Business Census (2024), there are 18 business establishments, employing about 333 people with an annual payroll of $21,893,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 5,441Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 18Source: CBP |
| 1st Quarter Payroll: | $5,091,000Source: CBP |
| Annual Payroll: | $21,893,000Source: CBP |
| # of Employees: | 333Source: CBP |
ZIP Code 21705 is located in Frederick County, Maryland, within the Washington-Arlington-Alexandria, DC-VA-MD-WV Metropolitan Statistical Area (CBSA 47900) and Maryland's 6th Congressional District. This Metro area has a population of 6,263,796 people, about 0.00% of whom live in ZIP Code 21705, and is subdivided into the Frederick-Gaithersburg-Bethesda, MD division. It covers 0.024 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Washington-Arlington-Alexandria, DC-VA-MD-WVSource: Census |
| CBSA Number: | 47900Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | Frederick-Gaithersburg-Bethesda, MD (CBSA Div 23224)Source: Census |
| CBSA Population: | 6,263,796Source: Census |
| MSA: | Washington-Baltimore, DC-MD-VA-WV CMSASource: Census |
| Land Area: | 0.024 sq miSource: Census |
| Water Area: | --Source: Census |
| Congressional District: | 06Source: USPS |
| Congressional Land Area: | 1950.26 sq miSource: Census |
| PMSA: | Washington, DC-MD-VA-WV PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 2430325Source: Census |
| Place Name: | Frederick city; MarylandSource: Census |
We could not locate which school district 21705 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.