Residential delivery area · Maryland
ZIP Code 21710: Adamstown, MD
ZIP code 21710 uses the postal name Adamstown, Maryland and lies entirely in Frederick County (Census 2020 ZIP-county file). About 4,700 people live there (Census Bureau, ACS 2020-2024). Median household income is $163,864 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Adamstown (4%) and Buckeystown (3%); 94% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Adamstown · its only residential ZIP
- County
- Frederick County
- Census places
- Adamstown (4%) census-designated place; Buckeystown (3%) census-designated place
- Metro area
- Washington-Arlington-Alexandria, DC-VA-MD-WV
- House district
- MD-6 119th Congress
- State
- Maryland
- Time zone
- Eastern
- Land area
- 29.4 sq mi · 159 people per sq mi
Where is ZIP code 21710?
21710 centers on 39.308°, -77.432° and covers 29.4 square miles of land plus 0.5 of water. It borders 7 ZIP codes: 21717, 21704, 21703, 21790, 21777, 20842, 21755.
The map draws ZIP code areas only. For the streets inside 21710, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 21710 compare with the rest of Frederick County?
| Measure | 21710 | In Frederick County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 4,661 | 21st of 35 | 243rd of 477 |
| Median household income | $164k | 6th of 26 | 33rd of 293 |
| Median home value | $591k | 6th of 28 | 55th of 320 |
Its median household income is higher than in 97% of U.S. residential ZIP codes, and it is denser than 60% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 21710?
The 2020 Census counted 4,769 people in 21710; the ACS, which samples households over 2020-2024, estimates 4,661. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 4,661±637 (90% margin)
- 2020 Census count
- 4,769
- Households
- 1,672
- Median age
- 51.9
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 21710?
Of the 4,661 people the ACS estimates in 21710, 16.3% are under 18 and 23.6% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (74.6%), then Hispanic or Latino (11.0%).
- Under 1816.3%
- 18 to 6460.1%
- 65 and older23.6%
- White, not Hispanic74.6%
- Hispanic or Latino11.0%
- Black, not Hispanic6.8%
- Asian, not Hispanic3.9%
- Other or two or more3.7%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 21710 earn?
Median household income is $163,864 (ACS 2020-2024), the 6th highest of the 26 ranked ZIP codes in Frederick County.
- Median household income
- $163,864±$18,190
- Income per person
- $70,997
- Below the poverty line
- 3.5%
- Unemployed (of the labor force)
- 0.9%
- Adults 25+ with a bachelor's degree
- 53.1%
- Adjusted gross income per tax return, 2022
- $124,4232,250 returns; wages 67% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 21710?
FHFA's house price index for 21710, built from repeat sales and appraisals of the same homes, rose 50% from 2015 to 2025 and rose 35% from 2020 to 2025, and moved −9.2% in 2025.
- Median home value (owners' estimate)
- $591,100
- Median gross rent
- $2,381
- Homes owned by their occupants
- 84.0%
- Housing units
- 1,773
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 21710?
55 business establishments had a location in this ZIP code in 2023, 1 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction10
- Professional, scientific, and technical services10
- Other services (except public administration)8
- Retail trade7
- Administrative and support and waste management and remediation services5
- Finance and insurance4
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 21710?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 21717 | Buckeystown | 245 | $158k | 2.1 mi |
| 21704 | Frederick | 20,006 | $161k | 4.4 mi |
| 21703 | Frederick | 41,960 | $106k | 4.6 mi |
| 21790 | Tuscarora | 170 | $78k | 4.9 mi |
| 21777 | Point Of Rocks | 2,462 | $160k | 5.5 mi |
| 20842 | Dickerson | 2,369 | $204k | 7.5 mi |
| 21755 | Jefferson | 5,909 | $137k | 8.1 mi |
| 21754 | Ijamsville | 8,156 | $182k | 6.4 mi (near) |
| 20838 | Barnesville | 306 | $250k+ | 6.7 mi (near) |
| 21705 | Frederick | 6 | – | 7.1 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.