Residential delivery area · Maryland
ZIP Code 21009: Bel Air South (Abingdon), MD
ZIP code 21009 is in Bel Air South (postal name Abingdon), Maryland, entirely in Harford County (Census 2020 ZIP-county file). About 34,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $121,660 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Bel Air South (61%) and Abingdon (24%), and 5% in smaller places; 9% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Abingdon · its only residential ZIP
- County
- Harford County
- Census places
- Bel Air South (61%) census-designated place; Abingdon (24%) census-designated place
- Metro area
- Baltimore-Columbia-Towson, MD
- House district
- MD-1 119th Congress
- State
- Maryland
- Time zone
- Eastern
- Land area
- 11.4 sq mi · 2,954 people per sq mi
Where is ZIP code 21009?
21009 centers on 39.471°, -76.285° and covers 11.4 square miles of land plus 0.7 of water. It borders 5 ZIP codes: 21017, 21040, 21085, 21001, 21015.
The map draws ZIP code areas only. For the streets inside 21009, 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 21009 compare with the rest of Harford County?
| Measure | 21009 | In Harford County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 33,679 | 2nd of 24 | 70th of 477 |
| Median household income | $122k | 8th of 18 | 118th of 293 |
| Median home value | $357k | 16th of 20 | 222nd of 320 |
Its median household income is higher than in 91% of U.S. residential ZIP codes, and it is denser than 88% 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 21009?
The 2020 Census counted 31,835 people in 21009; the ACS, which samples households over 2020-2024, estimates 33,679. Between the 2010 and 2020 censuses its population grew 7.0% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 33,679
- 2020 Census count
- 31,835+7.0% since 2010 (29,766)
- Households
- 12,940
- Median age
- 36.2
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 21009?
Of the 33,679 people the ACS estimates in 21009, 21.8% are under 18 and 12.2% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (69.6%), then Black (not Hispanic) (16.4%).
- Under 1821.8%
- 18 to 6466.0%
- 65 and older12.2%
- White, not Hispanic69.6%
- Black, not Hispanic16.4%
- Hispanic or Latino5.4%
- Other or two or more4.4%
- Asian, not Hispanic4.2%
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 21009 earn?
Median household income is $121,660 (ACS 2020-2024), the 8th highest of the 18 ranked ZIP codes in Harford County. It rose from $110,122 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $121,660
- Income per person
- $52,073
- Below the poverty line
- 4.3%
- Unemployed (of the labor force)
- 3.7%
- Adults 25+ with a bachelor's degree
- 41.3%
- Adjusted gross income per tax return, 2022
- $84,58016,010 returns; wages 82% 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 21009?
FHFA's house price index for 21009, built from repeat sales and appraisals of the same homes, rose 71% from 2015 to 2025 and rose 46% from 2020 to 2025, and moved +4.1% in 2025.
- Median home value (owners' estimate)
- $357,100
- Median gross rent
- $1,838
- Homes owned by their occupants
- 82.4%
- Housing units
- 13,256
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 21009?
431 business establishments had a location in this ZIP code in 2023, 22 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction63
- Health care and social assistance57
- Retail trade53
- Professional, scientific, and technical services45
- Other services (except public administration)45
- Accommodation and food services33
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 21009?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 21017 | Belcamp | 6,648 | $107k | 2.7 mi |
| 21040 | Edgewood | 24,960 | $82k | 2.9 mi |
| 21085 | Joppa | 17,307 | $114k | 4.2 mi |
| 21001 | Aberdeen | 27,168 | $83k | 5.0 mi |
| 21015 | Bel Air | 30,013 | $137k | 5.0 mi |
| 21130 | Perryman | 112 | $17k | 5.1 mi (near) |
| 21010 | Gunpowder | 239 | $99k | 5.6 mi (near) |
| 21014 | Bel Air | 38,707 | $117k | 5.7 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.