Residential delivery area · Maryland
ZIP Code 21001: Aberdeen, MD
ZIP code 21001 uses the postal name Aberdeen, Maryland and lies entirely in Harford County (Census 2020 ZIP-county file). About 27,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $83,238 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Aberdeen (21%) and Perryman (17%), and under 1% in smaller places; 62% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Aberdeen · its only residential ZIP
- County
- Harford County
- Census places
- Aberdeen (21%); Perryman (17%) census-designated place
- Neighborhoods
- Aberdeen Hills, Alton Homes, Baldwin Manor, Bar Kess Heights, Braemar, Burkley Manor and 19 more GeoNames
- Metro area
- Baltimore-Columbia-Towson, MD
- House district
- MD-1 119th Congress
- State
- Maryland
- Time zone
- Eastern
- Land area
- 30.0 sq mi · 907 people per sq mi
Where is ZIP code 21001?
21001 centers on 39.504°, -76.201° and covers 30.0 square miles of land plus 1.5 of water. It borders 7 ZIP codes: 21130, 21017, 21028, 21078, 21009, 21005, 21015.
The map draws ZIP code areas only. For the streets inside 21001, 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); neighborhoods from the GeoNames gazetteer (CC BY 4.0), placed in this ZIP code by PlainZIP.
How does 21001 compare with the rest of Harford County?
| Measure | 21001 | In Harford County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 27,168 | 4th of 24 | 96th of 477 |
| Median household income | $83k | 16th of 18 | 226th of 293 |
| Median home value | $286k | 18th of 20 | 268th of 320 |
Its median household income is higher than in 66% of U.S. residential ZIP codes, and it is denser than 77% 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 21001?
The 2020 Census counted 25,714 people in 21001; the ACS, which samples households over 2020-2024, estimates 27,168. Between the 2010 and 2020 censuses its population grew 19.7% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 27,168
- 2020 Census count
- 25,714+19.7% since 2010 (21,487)
- Households
- 11,204
- Median age
- 37.7
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 21001?
Of the 27,168 people the ACS estimates in 21001, 21.8% are under 18 and 15.3% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (49.4%), then Black (not Hispanic) (31.1%).
- Under 1821.8%
- 18 to 6462.9%
- 65 and older15.3%
- White, not Hispanic49.4%
- Black, not Hispanic31.1%
- Hispanic or Latino9.1%
- Other or two or more7.0%
- Asian, not Hispanic3.3%
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 21001 earn?
Median household income is $83,238 (ACS 2020-2024), the 16th highest of the 18 ranked ZIP codes in Harford County. It is not measurably different from 2015-2019 ($84,591 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $83,238±$8,360
- Income per person
- $41,898
- Below the poverty line
- 12.7%
- Unemployed (of the labor force)
- 5.8%
- Adults 25+ with a bachelor's degree
- 28.2%
- Adjusted gross income per tax return, 2022
- $67,79013,270 returns; wages 80% 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 21001?
FHFA's house price index for 21001, built from repeat sales and appraisals of the same homes, rose 69% from 2015 to 2025 and rose 46% from 2020 to 2025, and moved +0.4% in 2025.
- Median home value (owners' estimate)
- $285,800
- Median gross rent
- $1,442
- Homes owned by their occupants
- 63.3%
- Housing units
- 11,610
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 21001?
551 business establishments had a location in this ZIP code in 2023, 22 more than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade84
- Health care and social assistance71
- Accommodation and food services71
- Other services (except public administration)59
- Professional, scientific, and technical services52
- Construction43
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 21001?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 21130 | Perryman | 112 | $17k | 2.1 mi |
| 21017 | Belcamp | 6,648 | $107k | 2.7 mi |
| 21028 | Churchville | 3,103 | $138k | 5.0 mi |
| 21078 | Havre De Grace | 20,030 | $107k | 4.9 mi |
| 21009 | Abingdon | 33,679 | $122k | 5.0 mi |
| 21005 | Aberdeen Proving Ground | 2,202 | $125k | 5.3 mi |
| 21015 | Bel Air | 30,013 | $137k | 5.6 mi |
| 21040 | Edgewood | 24,960 | $82k | 6.8 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.