Residential delivery area · Maryland
ZIP Code 21779: Rohrersville, MD
ZIP code 21779 uses the postal name Rohrersville, Maryland and lies entirely in Washington County (Census 2020 ZIP-county file). About 1,300 people live there (Census Bureau, ACS 2020-2024). By Census place, its land lies in Gapland (2%) and Rohrersville (2%); 95% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Rohrersville · its only residential ZIP
- County
- Washington County
- Census places
- Gapland (2%) census-designated place; Rohrersville (2%) census-designated place
- Metro area
- Hagerstown-Martinsburg, MD-WV
- House district
- MD-6 119th Congress
- State
- Maryland
- Time zone
- Eastern
- Land area
- 9.7 sq mi · 135 people per sq mi
Where is ZIP code 21779?
21779 centers on 39.424°, -77.654° and covers 9.7 square miles of land. It borders 6 ZIP codes: 21715, 21756, 21769, 21758, 21755, 21713.
The map draws ZIP code areas only. For the streets inside 21779, 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 21779 compare with the rest of Washington County?
| Measure | 21779 | In Washington County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 1,311 | 13th of 20 | 336th of 477 |
| Median household income | – | – | – |
| Median home value | $609k | 1st of 15 | 50th of 320 |
It is denser than 58% of 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 21779?
The 2020 Census counted 971 people in 21779; the ACS, which samples households over 2020-2024, estimates 1,311. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 1,311±655 (90% margin)
- 2020 Census count
- 971
- Households
- 462
- Median age
- 41.8
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 21779?
Of the 1,311 people the ACS estimates in 21779, 18.4% are under 18 and 12.2% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (93.7%).
- Under 1818.4%
- 18 to 6469.4%
- 65 and older12.2%
- White, not Hispanic93.7%
- Other or two or more3.1%
- Hispanic or Latino1.3%
- Asian, not Hispanic1.3%
- Black, not Hispanic0.6%
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 are homes worth in 21779?
FHFA's house price index for 21779, built from repeat sales and appraisals of the same homes, rose 66% from 2015 to 2025 and rose 53% from 2020 to 2025.
- Median home value (owners' estimate)
- $608,800
- Median gross rent
- $1,133
- Homes owned by their occupants
- 66.2%
- Housing units
- 486
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 21779?
9 business establishments had a location in this ZIP code in 2023, 3 fewer than in 2018; the most are in other services (except public administration) (ZIP Code Business Patterns).
- Other services (except public administration)3
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 21779?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 21715 | Brownsville | 20 | – | 3.2 mi |
| 21756 | Keedysville | 3,640 | $102k | 3.2 mi |
| 21769 | Middletown | 11,965 | $152k | 4.7 mi |
| 21758 | Knoxville | 4,409 | $112k | 4.9 mi |
| 21755 | Jefferson | 5,909 | $137k | 6.4 mi |
| 21713 | Boonsboro | 9,846 | $96k | 7.0 mi |
| 21718 | Burkittsville | 134 | $94k | 2.6 mi (near) |
| 21782 | Sharpsburg | 3,704 | $94k | 6.1 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.