Allen is a community in Bennett County, South Dakota, home to about 783 people across 3.2 square miles. Its ZIP code is 57714.
Mostly Allen
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| Nearest major airport | Denver International Airport (DEN)276 miles away |
|---|---|
| Closer regional airport | Chadron Municipal Airport (CDR)66 miles away |
| Nearest city of 250,000+ | Aurora, CO287 miles away |
| Nearest city of 1 million+ | Chicago, IL732 miles away |
Straight-line distances from the center of Allen; 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.
Allen had 460 residents in the 2020 census, up 10% since 2000.
It’s the 102nd largest of 440 towns in South Dakota by population.
Bennett County grew from 96 residents in 1910 to 3,381 in 2020.
Bennett County, 1910–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 87°F in summer, and winter lows average 13°F. About 20.8 inches of rain and melted snow fall in a typical year, with about 48 inches of snow.
Source: NOAA 1991–2020 climate normals, Martin, SD weather station (12 miles away).
607 jobs at 60 businesses in Bennett 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.
Public schools here are run by American Horse School. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| American Horse SchoolAllen | K–8 | 240 | Public | 0.8 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.