Residential delivery area · Maryland
ZIP Code 21133: Randallstown, MD
ZIP code 21133 is in Randallstown, Maryland, entirely in Baltimore County (Census 2020 ZIP-county file). About 31,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $80,480 (Census Bureau, ACS 2020-2024). By Census place, 79% of its land lies in Randallstown (a census-designated place), and 3% in smaller places; 18% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Randallstown · its only residential ZIP
- County
- Baltimore County
- Census places
- Randallstown census-designated place
- Metro area
- Baltimore-Columbia-Towson, MD
- House districts
- MD-2 (97%), MD-7 (3%) 119th Congress, by share of land
- State
- Maryland
- Time zone
- Eastern
- Land area
- 9.0 sq mi · 3,504 people per sq mi
Where is ZIP code 21133?
21133 centers on 39.378°, -76.811° and covers 9.0 square miles of land plus 0.0 of water. It borders 5 ZIP codes: 21163, 21244, 21117, 21208, 21104.
The map draws ZIP code areas only. For the streets inside 21133, 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 21133 compare with the rest of Baltimore County?
| Measure | 21133 | In Baltimore County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 31,398 | 21st of 57 | 79th of 477 |
| Median household income | $81k | 35th of 42 | 235th of 293 |
| Median home value | $323k | 32nd of 45 | 252nd of 320 |
Its median household income is higher than in 63% of U.S. residential ZIP codes, and it is denser than 90% 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 21133?
The 2020 Census counted 30,527 people in 21133; the ACS, which samples households over 2020-2024, estimates 31,398. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 31,398
- 2020 Census count
- 30,527
- Households
- 12,204
- Median age
- 47.1
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 21133?
Of the 31,398 people the ACS estimates in 21133, 18.0% are under 18 and 20.7% are 65 or older. The largest group by race and Hispanic origin is Black (not Hispanic) (76.7%).
- Under 1818.0%
- 18 to 6461.2%
- 65 and older20.7%
- Black, not Hispanic76.7%
- White, not Hispanic9.4%
- Hispanic or Latino7.5%
- Other or two or more4.6%
- Asian, not Hispanic1.8%
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 21133 earn?
Median household income is $80,480 (ACS 2020-2024), the 35th highest of the 42 ranked ZIP codes in Baltimore County.
- Median household income
- $80,480
- Income per person
- $43,002
- Below the poverty line
- 9.3%
- Unemployed (of the labor force)
- 6.6%
- Adults 25+ with a bachelor's degree
- 33.3%
- Adjusted gross income per tax return, 2022
- $62,94015,510 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 21133?
FHFA's house price index for 21133, built from repeat sales and appraisals of the same homes, rose 78% from 2015 to 2025 and rose 46% from 2020 to 2025, and moved +5.7% in 2025.
- Median home value (owners' estimate)
- $322,800
- Median gross rent
- $1,556
- Homes owned by their occupants
- 68.4%
- Housing units
- 12,460
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 21133?
459 business establishments had a location in this ZIP code in 2023, 50 more than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance135
- Retail trade61
- Other services (except public administration)56
- Accommodation and food services48
- Construction28
- Administrative and support and waste management and remediation services26
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 21133?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 21163 | Woodstock | 7,539 | $135k | 3.4 mi |
| 21244 | Windsor Mill | 38,208 | $85k | 3.5 mi |
| 21117 | Owings Mills | 62,816 | $102k | 3.9 mi |
| 21208 | Pikesville | 37,276 | $90k | 4.7 mi |
| 21104 | Marriottsville | 6,052 | $192k | 5.8 mi |
| 21136 | Reisterstown | 32,088 | $119k | 4.6 mi (near) |
| 21207 | Gwynn Oak | 47,099 | $67k | 6.2 mi (near) |
| 21153 | Stevenson | 456 | $220k | 6.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.