Interior is a town in Jackson County, South Dakota, home to about 77 people across 1.3 square miles. It has no ZIP code of its own: it’s part of 57750.
Part is in Interior
We’re writing up Interior’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Denver International Airport (DEN)302 miles away |
|---|---|
| Closer regional airport | Rapid City Regional Airport (RAP)59 miles away |
| Nearest city of 250,000+ | Denver, CO313 miles away |
| Nearest city of 1 million+ | Chicago, IL735 miles away |
Straight-line distances from the center of Interior; 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.
Interior had 65 residents in the 2020 census, down 16% since 2000.
It’s the 332nd largest of 440 towns in South Dakota by population.
Jackson County grew from 2,472 residents in 1920 to 2,806 in 2020.
Jackson County, 1920–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 91°F in summer, and winter lows average 14°F. About 19.7 inches of rain and melted snow fall in a typical year, with about 38 inches of snow.
Source: NOAA 1991–2020 climate normals, Interior 3 Ne, SD weather station (2 miles away).
280 jobs at 53 businesses in Jackson 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.
Theaters and performance venues
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 Kadoka Area School District 35-2. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Interior Elementary - 09Interior | K–8 | 15 | Public | 1.0 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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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.