Residential delivery area · Maryland
ZIP Code 21102: Manchester, MD
ZIP code 21102 uses the postal name Manchester, Maryland and lies mostly in Carroll County (77% of its land) with the rest in Baltimore County (Census 2020 ZIP-county file). About 12,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $135,069 (Census Bureau, ACS 2020-2024). By Census place, 6% of its land lies in Manchester; 94% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Manchester · its only residential ZIP
- County
- Carroll County (77%); Baltimore County (23%)
- Census places
- Manchester
- Neighborhoods
- Country Life Estates, Holland Hills, Park Ridge, Pleasant Acres, Royal Heights, Westchester Square and 1 more GeoNames
- Metro area
- Baltimore-Columbia-Towson, MD
- House district
- MD-2 119th Congress
- State
- Maryland
- Time zone
- Eastern
- Land area
- 40.6 sq mi · 299 people per sq mi
Where is ZIP code 21102?
21102 centers on 39.692°, -76.848° and covers 40.6 square miles of land plus 0.6 of water. It borders 8 ZIP codes: 17329, 21074, 21053, 17327, 21120, 17331, 21158, 21157.
The map draws ZIP code areas only. For the streets inside 21102, 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); neighborhoods from the GeoNames gazetteer (CC BY 4.0), placed in this ZIP code by PlainZIP.
How does 21102 compare with the rest of Carroll County?
| Measure | 21102 | In Carroll County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 12,162 | 7th of 15 | 168th of 477 |
| Median household income | $135k | 5th of 15 | 85th of 293 |
| Median home value | $393k | 11th of 15 | 185th of 320 |
Its median household income is higher than in 94% of U.S. residential ZIP codes, and it is denser than 67% 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 21102?
The 2020 Census counted 12,100 people in 21102; the ACS, which samples households over 2020-2024, estimates 12,162. Between the 2010 and 2020 censuses its population grew 3.0% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 12,162
- 2020 Census count
- 12,100+3.0% since 2010 (11,751)
- Households
- 4,413
- Median age
- 44.5
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 21102?
Of the 12,162 people the ACS estimates in 21102, 21.0% are under 18 and 17.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (89.4%).
- Under 1821.0%
- 18 to 6461.6%
- 65 and older17.4%
- White, not Hispanic89.4%
- Other or two or more3.8%
- Hispanic or Latino2.6%
- Asian, not Hispanic2.6%
- Black, not Hispanic1.5%
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 21102 earn?
Median household income is $135,069 (ACS 2020-2024), the 5th highest of the 15 ranked ZIP codes in Carroll County. It rose from $111,043 in 2015-2019 (in 2024 dollars), a change larger than the surveys' margins of error.
- Median household income
- $135,069±$20,392
- Income per person
- $54,845
- Below the poverty line
- 3.4%
- Unemployed (of the labor force)
- 1.2%
- Adults 25+ with a bachelor's degree
- 34.7%
- Adjusted gross income per tax return, 2022
- $90,0285,970 returns; wages 74% 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 21102?
FHFA's house price index for 21102, built from repeat sales and appraisals of the same homes, rose 58% from 2015 to 2025 and rose 41% from 2020 to 2025, and moved +3.4% in 2025.
- Median home value (owners' estimate)
- $392,800
- Median gross rent
- $1,484
- Homes owned by their occupants
- 89.4%
- Housing units
- 4,511
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 21102?
229 business establishments had a location in this ZIP code in 2023, 5 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction63
- Other services (except public administration)30
- Professional, scientific, and technical services21
- Health care and social assistance21
- Retail trade17
- Administrative and support and waste management and remediation services17
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 21102?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 17329 | Glenville, PA | 2,999 | $121k | 4.6 mi |
| 21074 | Hampstead | 14,777 | $109k | 4.9 mi |
| 21053 | Freeland | 2,929 | $90k | 7.1 mi |
| 17327 | Glen Rock, PA | 7,828 | $101k | 7.8 mi |
| 21120 | Parkton | 7,440 | $162k | 9.7 mi |
| 17331 | Hanover, PA | 56,443 | $80k | 9.8 mi |
| 21158 | Westminster | 22,083 | $110k | 10.3 mi |
| 21157 | Westminster | 38,984 | $105k | 12.3 mi |
| 21155 | Upperco | 3,313 | $123k | 8.5 mi (near) |
| 17311 | Codorus, PA | 127 | $78k | 8.6 mi (near) |
| 17355 | Railroad, PA | 322 | – | 9.3 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.