Find the last 4 digits (ZIP+4) for an address in 20855

ZIP 20855, Derwood, MD is filled in. Just type the street address.

Addresses are checked through our secure proxy. Bot checks use Cloudflare Turnstile. Each device can run 5 live checks per day; repeats of the same address are free.

ZIP Code 20855 – Derwood, MD

Derwood, Maryland · Montgomery County · Eastern time

ZIP code20855
CityDerwood
StateMaryland
CountyMontgomery County
Population17,279
Time zoneEastern · local time
ZIP typeStandard (has a Census ZCTA area)
Land area13.07 sq mi
Center (lat, long)39.1370, -77.1318

Area codes in this area

227240301

These are the area codes that most often serve ZIP 20855 (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

20880 Washington Grove · 2.3 mi20879 Gaithersburg · 2.7 mi20832 Olney · 3 mi20853 Rockville · 3.1 mi20877 Gaithersburg · 3.2 mi20883 Gaithersburg · 3.6 mi20830 Olney · 3.7 mi20847 Rockville · 3.8 mi

About ZIP 20855

ZIP code 20855 is assigned to Derwood, Maryland. It lies in Montgomery County. Its Census area covers about 13.07 square miles of land. The closest neighboring ZIP is 20880 (Washington Grove), about 2.3 miles away.

Every address in 20855 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