Find the last 4 digits (ZIP+4) for an address in 20659

ZIP 20659, Mechanicsville, MD is filled in. Just type the street address.

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ZIP Code 20659 – Mechanicsville, MD

Mechanicsville, Maryland · St. Mary's County · Eastern time

ZIP code20659
CityMechanicsville
StateMaryland
CountySt. Mary's CountyCharles County
Population24,324
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area97.01 sq mi
Center (lat, long)38.4079, -76.7320

Area codes in this area

227240301

These are the area codes that most often serve ZIP 20659 (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Map

Nearby ZIP codes

20660 Morganza · 3 mi20624 Clements · 4.8 mi20656 Loveville · 5.5 mi20621 Chaptico · 6.8 mi20612 Benedict · 7.6 mi20622 Charlotte Hall · 7.9 mi20637 Hughesville · 8.2 mi20609 Avenue · 8.8 mi

About ZIP 20659

ZIP code 20659 is assigned to Mechanicsville, Maryland. It crosses 2 counties; most of its land is in St. Mary's County. Its Census area covers about 97.01 square miles of land. The closest neighboring ZIP is 20660 (Morganza), about 3 miles away.

Every address in 20659 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources