Residential delivery area · Maryland
ZIP Code 21120: Parkton, MD
ZIP code 21120 uses the postal name Parkton, Maryland and lies entirely in Baltimore County (Census 2020 ZIP-county file). About 7,400 people live there (Census Bureau, ACS 2020-2024). Median household income is $162,052 (Census Bureau, ACS 2020-2024). Its land lies outside any incorporated or census-designated place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Parkton · its only residential ZIP
- County
- Baltimore County
- 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
- 42.0 sq mi · 177 people per sq mi
Where is ZIP code 21120?
21120 centers on 39.646°, -76.675° and covers 42.0 square miles of land plus 0.7 of water. It borders 10 ZIP codes: 21053, 21105, 21161, 21152, 21111, 17349, 21155, 21074, 17363, 21102.
The map draws ZIP code areas only. For the streets inside 21120, 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 21120 compare with the rest of Baltimore County?
| Measure | 21120 | In Baltimore County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 7,440 | 34th of 57 | 203rd of 477 |
| Median household income | $162k | 3rd of 42 | 38th of 293 |
| Median home value | $581k | 8th of 45 | 58th of 320 |
Its median household income is higher than in 97% of U.S. residential ZIP codes, and it is denser than 61% 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 21120?
The 2020 Census counted 7,178 people in 21120; the ACS, which samples households over 2020-2024, estimates 7,440. Between the 2010 and 2020 censuses its population grew 3.0% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 7,440±890 (90% margin)
- 2020 Census count
- 7,178+3.0% since 2010 (6,967)
- Households
- 2,599
- Median age
- 40.8
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 21120?
Of the 7,440 people the ACS estimates in 21120, 27.1% are under 18 and 16.6% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (86.2%).
- Under 1827.1%
- 18 to 6456.3%
- 65 and older16.6%
- White, not Hispanic86.2%
- Other or two or more5.5%
- Hispanic or Latino4.5%
- Black, not Hispanic2.0%
- 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 21120 earn?
Median household income is $162,052 (ACS 2020-2024), the 3rd highest of the 42 ranked ZIP codes in Baltimore County. It is not measurably different from 2015-2019 ($140,958 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $162,052±$18,083
- Income per person
- $74,584
- Below the poverty line
- 2.8%
- Unemployed (of the labor force)
- 1.7%
- Adults 25+ with a bachelor's degree
- 64.2%
- Adjusted gross income per tax return, 2022
- $145,4993,570 returns; wages 68% 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 21120?
FHFA's house price index for 21120, built from repeat sales and appraisals of the same homes, rose 51% from 2015 to 2025 and rose 37% from 2020 to 2025, and moved +5.0% in 2025.
- Median home value (owners' estimate)
- $580,900
- Median gross rent
- $1,271
- Homes owned by their occupants
- 93.8%
- Housing units
- 2,622
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 21120?
174 business establishments had a location in this ZIP code in 2023, 12 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction35
- Professional, scientific, and technical services25
- Other services (except public administration)19
- Health care and social assistance17
- Administrative and support and waste management and remediation services14
- Finance and insurance13
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 21120?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 21053 | Freeland | 2,929 | $90k | 4.1 mi |
| 21105 | Maryland Line | 36 | – | 4.9 mi |
| 21161 | White Hall | 5,221 | $108k | 5.9 mi |
| 21152 | Sparks Glencoe | 6,459 | $121k | 6.3 mi |
| 21111 | Monkton | 4,714 | $136k | 6.7 mi |
| 17349 | New Freedom, PA | 8,254 | $121k | 6.9 mi |
| 21155 | Upperco | 3,313 | $123k | 8.6 mi |
| 21074 | Hampstead | 14,777 | $109k | 8.9 mi |
| 17363 | Stewartstown, PA | 8,553 | $107k | 9.6 mi |
| 21102 | Manchester | 12,162 | $135k | 9.7 mi |
| 17355 | Railroad, PA | 322 | – | 7.9 mi (near) |
| 17361 | Shrewsbury, PA | 6,156 | $105k | 8.3 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.