ZIP code · North Sioux City · South Dakota · United States

ZIP code 57049 — North Sioux City

ZIP code 57049 serves North Sioux City, South Dakota.

Postal code
57049
Single source Value from one source, not cross-checked.
City
North Sioux City
County
Union FIPS 46127
State
South Dakota
Country
United States
Coordinates
42.5249, -96.5074 — precision precise (locality)
View on OpenStreetMap
Population
7,814 (ZCTA, ACS 5-year)
Population density
551 / sq mi
Land area
14.2 sq mi (36.7 km²) (ZCTA, ACS 5-year)
Median household income
$93,239
Per-capita income
$58,663
Median age
39.3
Households
3,287
Housing units
3,386
Median home value
$406,300
Median gross rent
$1,160 / month
Congressional district
SD At-large (119th Congress)
USDA hardiness zone
5a (-20 to -15 °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 86°F), coldest Jan (avg low 9°F).

JanFebMarAprMayJunJulAugSepOctNovDec
Avg high °F303547617282868377644734
Avg low °F91324354758636151372414
Precip in0.70.91.63.14.44.63.43.93.02.41.41.0

NOAA 1991–2020 climate normals from the nearest station: SIOUX CITY ANG (11.1 mi) · NOAA NCEI

Places in ZIP 57049

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