Residential delivery area · Maryland
ZIP Code 20778: West River, MD
ZIP code 20778 uses the postal name West River, Maryland and lies entirely in Anne Arundel County (Census 2020 ZIP-county file). About 2,200 people live there (Census Bureau, ACS 2020-2024). Median household income is $205,974 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Shady Side (18%) and Galesville (11%); 71% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- West River · its only residential ZIP
- County
- Anne Arundel County
- Census places
- Shady Side (18%) census-designated place; Galesville (11%) census-designated place
- Metro area
- Baltimore-Columbia-Towson, MD
- House district
- MD-5 119th Congress
- State
- Maryland
- Time zone
- Eastern
- Land area
- 7.6 sq mi · 289 people per sq mi
Where is ZIP code 20778?
20778 centers on 38.829°, -76.573° and covers 7.6 square miles of land plus 0.8 of water. It borders 6 ZIP codes: 20765, 20751, 20733, 20776, 20764, 20711.
The map draws ZIP code areas only. For the streets inside 20778, 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 20778 compare with the rest of Anne Arundel County?
| Measure | 20778 | In Anne Arundel County | In MD |
|---|---|---|---|
| People (ACS 2020-2024) | 2,211 | 34th of 42 | 303rd of 477 |
| Median household income | $206k | 1st of 30 | 11th of 293 |
| Median home value | $717k | 2nd of 32 | 25th of 320 |
Its median household income is higher than in 99% 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 20778?
The 2020 Census counted 1,871 people in 20778; the ACS, which samples households over 2020-2024, estimates 2,211. Between the 2010 and 2020 censuses its population fell 6.9% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 2,211±887 (90% margin)
- 2020 Census count
- 1,871−6.9% since 2010 (2,009)
- Households
- 729
- Median age
- 47.7
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 20778?
Of the 2,211 people the ACS estimates in 20778, 24.9% are under 18 and 16.0% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (84.2%).
- Under 1824.9%
- 18 to 6459.2%
- 65 and older16.0%
- White, not Hispanic84.2%
- Hispanic or Latino9.3%
- Black, not Hispanic4.1%
- Other or two or more2.4%
- Asian, not Hispanic0.0%
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 20778 earn?
Median household income is $205,974 (ACS 2020-2024), the highest of the 30 ranked ZIP codes in Anne Arundel County. It is not measurably different from 2015-2019 ($175,766 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $205,974
- Income per person
- $66,972
- Below the poverty line
- 0.8%
- Unemployed (of the labor force)
- 2.3%
- Adults 25+ with a bachelor's degree
- 49.9%
- Adjusted gross income per tax return, 2022
- $146,949930 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 20778?
FHFA's house price index for 20778, built from repeat sales and appraisals of the same homes, rose 52% from 2015 to 2025 and rose 32% from 2020 to 2025, and moved −2.9% in 2025.
- Median home value (owners' estimate)
- $716,500
- Median gross rent
- –
- Homes owned by their occupants
- 100.0%
- Housing units
- 747
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 20778?
44 business establishments had a location in this ZIP code in 2023, 1 fewer than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction9
- Health care and social assistance8
- Professional, scientific, and technical services6
- Administrative and support and waste management and remediation services6
- Other services (except public administration)4
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 20778?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 20765 | Galesville | 668 | $150k | 1.8 mi |
| 20751 | Deale | 2,851 | $124k | 2.4 mi |
| 20733 | Churchton | 2,669 | $127k | 2.7 mi |
| 20776 | Harwood | 3,315 | $149k | 3.6 mi |
| 20764 | Shady Side | 2,993 | $119k | 3.7 mi |
| 20711 | Lothian | 7,731 | $114k | 4.3 mi |
| 20779 | Tracys Landing | 883 | $179k | 4.8 mi (near) |
| 21037 | Edgewater | 20,854 | $146k | 6.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.