ZIP code · Watertown · South Dakota · United States

ZIP code 57201 — Watertown

ZIP code 57201 serves Watertown, South Dakota.

Postal code
57201
Single source Value from one source, not cross-checked.
City
Watertown
County
Codington FIPS 46029
State
South Dakota
Country
United States
Coordinates
44.9043, -97.1240 — precision precise (locality)
View on OpenStreetMap
Population
26,375 (ZCTA, ACS 5-year)
Population density
83 / sq mi
Land area
319.1 sq mi (826.4 km²) (ZCTA, ACS 5-year)
Median household income
$64,809
Per-capita income
$37,334
Median age
39.5
Households
11,442
Housing units
12,304
Median home value
$223,600
Median gross rent
$903 / month
Congressional district
SD At-large (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
605
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 82°F), coldest Jan (avg low 3°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F212639546777828072564026
Avg low °F372032455560584935219
Precip in0.60.71.02.12.93.93.02.92.51.90.70.7

NOAA 1991–2020 climate normals from the nearest station: WATERTOWN RGNL AP (1.2 mi) · NOAA NCEI

Places in ZIP 57201

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