Sinai is a town in Brookings County, South Dakota, home to about 215 people across 0.4 square miles. Its ZIP code is 57061.
All in Sinai
We’re writing up Sinai’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Minneapolis–Saint Paul International Airport / Wold–Chamberlain Field (MSP)193 miles away |
|---|---|
| Closer regional airport | Watertown Regional Airport (ATY)47 miles away |
| Nearest city of 250,000+ | Minneapolis, MN192 miles away |
| Nearest city of 1 million+ | Chicago, IL501 miles away |
Straight-line distances from the center of Sinai; 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.
Sinai had 99 residents in the 2020 census, down 26% since 2000.
It’s the 227th largest of 440 towns in South Dakota by population.
Brookings County grew from 12,561 residents in 1900 to 34,375 in 2020.
Brookings County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 83°F in summer, and winter lows average 5°F. About 26.5 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Arlington 1 W, SD weather station (10 miles away).
15,151 jobs at 958 businesses in Brookings 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.
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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.