Residential delivery area · Maryland
ZIP Code 21136: Reisterstown, MD
ZIP code 21136 uses the postal name Reisterstown, Maryland and lies mostly in Baltimore County (96% of its land) with the rest in Carroll County (Census 2020 ZIP-county file). About 32,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $118,500 (Census Bureau, ACS 2020-2024). By Census place, 7% of its land lies in Reisterstown (a census-designated place); 93% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Reisterstown · its only residential ZIP
- County
- Baltimore County (96%); Carroll County (4%)
- Census places
- Reisterstown census-designated place
- Metro area
- Baltimore-Columbia-Towson, MD
- House district
- MD-2 119th Congress
- State
- Maryland
- Time zone
- Eastern
- Land area
- 56.2 sq mi · 571 people per sq mi
Where is ZIP code 21136?
21136 centers on 39.439°, -76.845° and covers 56.2 square miles of land plus 1.6 of water. It borders 9 ZIP codes: 21071, 21117, 21048, 21104, 21784, 21023, 21030, 21155, 21152.
The map draws ZIP code areas only. For the streets inside 21136, 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 21136 compare with the rest of Baltimore County?
| Measure | 21136 | In Baltimore County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 32,088 | 19th of 57 | 75th of 477 |
| Median household income | $119k | 13th of 42 | 128th of 293 |
| Median home value | $422k | 21st of 45 | 169th of 320 |
Its median household income is higher than in 90% of U.S. residential ZIP codes, and it is denser than 73% 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 21136?
The 2020 Census counted 34,973 people in 21136; the ACS, which samples households over 2020-2024, estimates 32,088. Between the 2010 and 2020 censuses its population grew 3.5% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 32,088
- 2020 Census count
- 34,973+3.5% since 2010 (33,781)
- Households
- 13,048
- Median age
- 46.3
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 21136?
Of the 32,088 people the ACS estimates in 21136, 19.3% are under 18 and 20.2% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (54.3%), then Black (not Hispanic) (24.2%).
- Under 1819.3%
- 18 to 6460.5%
- 65 and older20.2%
- White, not Hispanic54.3%
- Black, not Hispanic24.2%
- Hispanic or Latino8.9%
- Asian, not Hispanic6.4%
- Other or two or more6.1%
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 21136 earn?
Median household income is $118,500 (ACS 2020-2024), the 13th highest of the 42 ranked ZIP codes in Baltimore County. It rose from $103,081 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $118,500
- Income per person
- $59,518
- Below the poverty line
- 8.7%
- Unemployed (of the labor force)
- 4.4%
- Adults 25+ with a bachelor's degree
- 54.6%
- Adjusted gross income per tax return, 2022
- $108,85117,560 returns; wages 66% 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 21136?
FHFA's house price index for 21136, built from repeat sales and appraisals of the same homes, rose 62% from 2015 to 2025 and rose 44% from 2020 to 2025, and moved +2.6% in 2025.
- Median home value (owners' estimate)
- $422,100
- Median gross rent
- $1,524
- Homes owned by their occupants
- 79.4%
- Housing units
- 13,837
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 21136?
708 business establishments had a location in this ZIP code in 2023, 49 more than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services114
- Construction97
- Other services (except public administration)81
- Retail trade78
- Health care and social assistance69
- Administrative and support and waste management and remediation services54
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 21136?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 21071 | Glyndon | 404 | $214k | 3.6 mi |
| 21117 | Owings Mills | 62,816 | $102k | 3.8 mi |
| 21048 | Finksburg | 10,481 | $132k | 6.0 mi |
| 21104 | Marriottsville | 6,052 | $192k | 7.3 mi |
| 21784 | Sykesville | 39,258 | $139k | 7.4 mi |
| 21023 | Butler | 66 | $85k | 8.0 mi |
| 21030 | Cockeysville | 25,827 | $89k | 9.4 mi |
| 21155 | Upperco | 3,313 | $123k | 9.5 mi |
| 21152 | Sparks Glencoe | 6,459 | $121k | 11.7 mi |
| 21133 | Randallstown | 31,398 | $81k | 4.6 mi (near) |
| 21163 | Woodstock | 7,539 | $135k | 7.0 mi (near) |
| 21208 | Pikesville | 37,276 | $90k | 7.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.