Residential delivery area · Maryland
ZIP Code 21131: Phoenix, MD
ZIP code 21131 uses the postal name Phoenix, Maryland and lies entirely in Baltimore County (Census 2020 ZIP-county file). About 7,100 people live there (Census Bureau, ACS 2020-2024). Median household income is $197,619 (Census Bureau, ACS 2020-2024). Its land lies mostly outside any Census place; 3% is in small places.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Phoenix · its only residential ZIP
- County
- Baltimore County
- Metro area
- Baltimore-Columbia-Towson, MD
- House districts
- MD-1 (57%), MD-2 (43%) 119th Congress, by share of land
- State
- Maryland
- Time zone
- Eastern
- Land area
- 21.0 sq mi · 340 people per sq mi
Where is ZIP code 21131?
21131 centers on 39.504°, -76.589° and covers 21.0 square miles of land plus 1.4 of water. It borders 6 ZIP codes: 21111, 21013, 21093, 21057, 21030, 21152.
The map draws ZIP code areas only. For the streets inside 21131, 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 21131 compare with the rest of Baltimore County?
| Measure | 21131 | In Baltimore County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 7,141 | 35th of 57 | 206th of 477 |
| Median household income | $198k | 1st of 42 | 14th of 293 |
| Median home value | $686k | 1st of 45 | 30th of 320 |
Its median household income is higher than in 99% of U.S. residential ZIP codes, and it is denser than 68% 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 21131?
The 2020 Census counted 7,468 people in 21131; the ACS, which samples households over 2020-2024, estimates 7,141. Between the 2010 and 2020 censuses its population grew 3.0% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 7,141±872 (90% margin)
- 2020 Census count
- 7,468+3.0% since 2010 (7,253)
- Households
- 2,600
- Median age
- 49.4
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 21131?
Of the 7,141 people the ACS estimates in 21131, 21.7% are under 18 and 22.2% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (92.8%).
- Under 1821.7%
- 18 to 6456.1%
- 65 and older22.2%
- White, not Hispanic92.8%
- Other or two or more3.7%
- Hispanic or Latino1.5%
- Asian, not Hispanic1.3%
- Black, not Hispanic0.7%
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 21131 earn?
Median household income is $197,619 (ACS 2020-2024), the highest of the 42 ranked ZIP codes in Baltimore County. It is not measurably different from 2015-2019 ($177,386 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $197,619±$35,903
- Income per person
- $82,991
- Below the poverty line
- 4.7%
- Unemployed (of the labor force)
- 3.9%
- Adults 25+ with a bachelor's degree
- 73.9%
- Adjusted gross income per tax return, 2022
- $236,6723,780 returns; wages 58% 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 21131?
FHFA's house price index for 21131, built from repeat sales and appraisals of the same homes, rose 49% from 2015 to 2025 and rose 38% from 2020 to 2025, and moved +2.8% in 2025.
- Median home value (owners' estimate)
- $686,000
- Median gross rent
- –
- Homes owned by their occupants
- 98.4%
- Housing units
- 2,658
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 21131?
215 business establishments had a location in this ZIP code in 2023, 12 more than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services43
- Construction32
- Finance and insurance29
- Health care and social assistance20
- Real estate and rental and leasing18
- Other services (except public administration)14
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 21131?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 21111 | Monkton | 4,714 | $136k | 4.9 mi |
| 21013 | Baldwin | 5,610 | $171k | 5.3 mi |
| 21093 | Lutherville Timonium | 39,100 | $126k | 5.4 mi |
| 21057 | Glen Arm | 4,386 | $146k | 5.6 mi |
| 21030 | Cockeysville | 25,827 | $89k | 5.9 mi |
| 21152 | Sparks Glencoe | 6,459 | $121k | 6.2 mi |
| 21031 | Hunt Valley | 26 | – | 3.9 mi (near) |
| 21082 | Hydes | 626 | $146k | 6.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.