Residential delivery area · Maryland
ZIP Code 21220: Middle River, MD
ZIP code 21220 is in Middle River, Maryland, entirely in Baltimore County (Census 2020 ZIP-county file). About 43,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $81,817 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Middle River (52%) and Bowleys Quarters (15%), and under 1% in smaller places; 32% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Middle River · its only residential ZIP
- County
- Baltimore County
- Census places
- Middle River (52%) census-designated place; Bowleys Quarters (15%) census-designated place
- Metro area
- Baltimore-Columbia-Towson, MD
- House districts
- MD-2 (58%), MD-1 (42%) 119th Congress, by share of land
- State
- Maryland
- Time zone
- Eastern
- Land area
- 21.2 sq mi · 2,022 people per sq mi
Where is ZIP code 21220?
21220 centers on 39.343°, -76.391° and covers 21.2 square miles of land plus 6.7 of water. It borders 3 ZIP codes: 21162, 21221, 21237.
The map draws ZIP code areas only. For the streets inside 21220, 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 21220 compare with the rest of Baltimore County?
| Measure | 21220 | In Baltimore County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 42,824 | 12th of 57 | 34th of 477 |
| Median household income | $82k | 34th of 42 | 231st of 293 |
| Median home value | $300k | 33rd of 45 | 259th of 320 |
Its median household income is higher than in 64% of U.S. residential ZIP codes, and it is denser than 85% 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 21220?
The 2020 Census counted 44,568 people in 21220; the ACS, which samples households over 2020-2024, estimates 42,824. Between the 2010 and 2020 censuses its population grew 13.7% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 42,824
- 2020 Census count
- 44,568+13.7% since 2010 (39,199)
- Households
- 16,544
- 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 21220?
Of the 42,824 people the ACS estimates in 21220, 22.9% are under 18 and 13.8% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (51.7%), then Black (not Hispanic) (30.6%).
- Under 1822.9%
- 18 to 6463.2%
- 65 and older13.8%
- White, not Hispanic51.7%
- Black, not Hispanic30.6%
- Other or two or more6.7%
- Asian, not Hispanic6.0%
- Hispanic or Latino5.0%
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 21220 earn?
Median household income is $81,817 (ACS 2020-2024), the 34th highest of the 42 ranked ZIP codes in Baltimore County. It is not measurably different from 2015-2019 ($86,871 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $81,817
- Income per person
- $41,843
- Below the poverty line
- 13.6%
- Unemployed (of the labor force)
- 4.2%
- Adults 25+ with a bachelor's degree
- 30.0%
- Adjusted gross income per tax return, 2022
- $69,31322,000 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 21220?
FHFA's house price index for 21220, built from repeat sales and appraisals of the same homes, rose 69% from 2015 to 2025 and rose 44% from 2020 to 2025, and moved +6.4% in 2025.
- Median home value (owners' estimate)
- $300,100
- Median gross rent
- $1,673
- Homes owned by their occupants
- 68.8%
- Housing units
- 17,918
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 21220?
697 business establishments had a location in this ZIP code in 2023, 60 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction135
- Retail trade87
- Other services (except public administration)73
- Accommodation and food services66
- Health care and social assistance57
- Administrative and support and waste management and remediation services53
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 21220?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 21162 | White Marsh | 4,639 | $158k | 3.3 mi |
| 21221 | Essex | 43,487 | $67k | 4.3 mi |
| 21237 | Rosedale | 31,425 | $92k | 5.6 mi |
| 21128 | Perry Hall | 15,501 | $128k | 5.2 mi (near) |
| 21236 | Nottingham | 39,514 | $95k | 5.9 mi (near) |
| 21156 | Upper Falls | 204 | – | 6.0 mi (near) |
| 21010 | Gunpowder | 239 | $99k | 6.2 mi (near) |
| 21085 | Joppa | 17,307 | $114k | 7.3 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.