ZIP code · Nanticoke · Maryland · United States

ZIP code 21840 — Nanticoke

ZIP code 21840 serves Nanticoke, Maryland.

Postal code
21840
Single source Value from one source, not cross-checked.
City
Nanticoke
County
Wicomico FIPS 24045
State
Maryland
Country
United States
Coordinates
38.2672, -75.9021 — precision precise (locality)
View on OpenStreetMap
Population
573 (ZCTA, ACS 5-year)
Population density
109 / sq mi
Land area
5.3 sq mi (13.7 km²) (ZCTA, ACS 5-year)
Median household income
$120,324
Per-capita income
$58,067
Median age
48.5
Households
193
Housing units
404
Congressional district
MD-1 (119th Congress)
USDA hardiness zone
8a (10 to 15 °F)
Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
Time zone
America/New_York (UTC−5 / UTC−4 DST)
Area codes
410, 443, 667
Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.

Climate — monthly normals

Warmest month Jul (avg high 90°F), coldest Jan (avg low 28°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F485058697886908882726151
Avg low °F282936445463696761493931

NOAA 1991–2020 climate normals from the nearest station: VIENNA (15.8 mi) · NOAA NCEI

Places in ZIP 21840

Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology

About this page

US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.

GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page