Iroquois is a city in Kingsbury County, South Dakota, home to about 389 people across 0.6 square miles. Its ZIP code is 57353.
Mostly Iroquois; also Bancroft and Collins Colony
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| Nearest major airport | Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field (MSP)231 miles away |
|---|---|
| Closer regional airport | Watertown Regional Airport (ATY)52 miles away |
| Nearest city of 250,000+ | Minneapolis, MN229 miles away |
| Nearest city of 1 million+ | Chicago, IL541 miles away |
Straight-line distances from the center of Iroquois; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Iroquois had 292 residents in the 2020 census, up 5% since 2000.
It’s the 173rd largest of 440 towns in South Dakota by population.
Kingsbury County grew from 9,866 residents in 1900 to 5,187 in 2020.
Kingsbury County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 82°F in summer, and winter lows average 5°F. About 26.1 inches of rain and melted snow fall in a typical year, with about 41 inches of snow.
Source: NOAA 1991–2020 climate normals, De Smet, SD weather station (15 miles away).
1,254 jobs at 188 businesses in Kingsbury County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
Nearest hospitals
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances.
Museums
Counts are within about 1 mile of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Iroquois School District 02-3, Willow Lake School District 12-3. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Iroquois Elementary - 04Iroquois | Pre-K–5 | 114 | Public | 1.5 mi |
| Collins Colony Elementary - 06Iroquois | K–8 | 16 | Public | 15.9 mi |
| Pearl Creek Colony Elementary - 05Iroquois | 4–8 | 13 | Public | 3.3 mi |
| Iroquois Middle School - 02Iroquois | 6–8 | 48 | Public | 1.5 mi |
| Iroquois High School - 01Iroquois | 9–12 | 45 | Public | 1.5 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Sunny Plains Christian SchoolIroquois | K–8 | 30 | Church of God in Christ | 8.5 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Bancroft, Collins Colony and Pearl Creek Colony.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.