Zip Code 20689 — Sunderland, MD

ZIP Code 20689 is associated with Sunderland, MD, in Calvert County. The listed population estimate is 1,809; estimated density is 90.6 people per square mile. Among records with population estimates, it ranks #9 of 12 in Calvert County and #317 of 470 in MD.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (38.669630, -76.585910)

Data MetricLocal Statistic
Postal / Zip Code20689
Primary CitySunderland
State / ProvinceMD
CountyCalvert
Total Population1,809
Population Density90.6 people/sq mi
TimezoneAmerica/New_York

How 20689 Compares

MetricZIP 20689Calvert County recordsMD records
Population estimate1,80992,015 (sum)6,205,597 (sum)
Population Density90.6 /sq mi----
County population rank#9 of 12----
State population rank#317 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 20732Chesapeake Beach2.5 mi10,722
ZIP 20736Owings2.7 mi9,960
ZIP 20714North Beach4.2 mi4,525
ZIP 20639Huntingtown4.4 mi15,544
ZIP 20758Friendship4.5 mi714

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 →