ZIP code · Watertown · Minnesota · United States

ZIP code 55388 — Watertown

ZIP code 55388 serves Watertown, Minnesota.

Postal code
55388
Single source Value from one source, not cross-checked.
City
Watertown
County
Carver FIPS 27019
State
Minnesota
Country
United States
Coordinates
44.9595, -93.8482 — precision precise (locality)
View on OpenStreetMap
Population
5,974 (ZCTA, ACS 5-year)
Population density
159 / sq mi
Land area
37.6 sq mi (97.5 km²) (ZCTA, ACS 5-year)
Median household income
$92,273
Per-capita income
$41,807
Median age
35.7
Households
2,286
Housing units
2,386
Median home value
$333,100
Median gross rent
$998 / month
Congressional districts
MN-6 (also MN-3) (119th Congress)
USDA hardiness zone
4b (-25 to -20 °F)
Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
Time zone
America/Chicago (UTC−6 / UTC−5 DST)
Area code
320 (from the nearest rate centre)
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 83°F), coldest Jan (avg low 4°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F232840566978838072584128
Avg low °F4721334757625950372412

NOAA 1991–2020 climate normals from the nearest station: DELANO (7.0 mi) · NOAA NCEI

Places in ZIP 55388

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