Zip Code 20778 — West River, MD

ZIP Code 20778 is associated with West River, MD, in Anne Arundel County. The listed population estimate is 2,211; estimated density is 111.7 people per square mile. Among records with population estimates, it ranks #30 of 36 in Anne Arundel County and #303 of 470 in MD.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (38.837330, -76.566470)

Data MetricLocal Statistic
Postal / Zip Code20778
Primary CityWest River
State / ProvinceMD
CountyAnne Arundel
Total Population2,211
Population Density111.7 people/sq mi
TimezoneAmerica/New_York

How 20778 Compares

MetricZIP 20778Anne Arundel County recordsMD records
Population estimate2,211611,016 (sum)6,205,597 (sum)
Population Density111.7 /sq mi----
County population rank#30 of 36----
State population rank#303 of 470----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in MD

ZIP CodeCityDistancePopulation estimate
ZIP 20765Galesville1.2 mi668
ZIP 20733Churchton2.9 mi2,669
ZIP 20751Deale2.9 mi2,851
ZIP 20764Shady Side3.0 mi2,993
ZIP 20776Harwood3.1 mi3,315

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →