Weston County, Wyoming

Weston County sits in the northeastern corner of Wyoming, where the rugged Black Hills stretch westward from South Dakota. Newcastle, the county seat, is a small community with a strong sense of pride and plenty of local character.

Ranching is a major part of life here, and it’s not unusual to see far more cattle than people across the open range. Weston County also has a fascinating past, especially its connection to the Black Hills gold rush, when the area was buzzing with activity. Today, life is much quieter and more relaxed.

There’s still plenty to explore, with Devils Tower National Monument and the Crazy Horse Memorial both within easy reach. The wide-open prairies have a simple, rugged beauty of their own. Locals are proud of their rural way of life, and they’ll gladly tell you that few places are better for watching a Wyoming sunset or looking up at a sky full of stars.

Category Details
County Name Weston County
County Seat Newcastle
Cities, Towns, and Communities Newcastle, Upton, Osage
Interstates and Highways US-16, US-85, WY-450
Etymology Named after John B. Weston, a Wyoming politician
FIPS Code 56-045
Total Area (Land and Water) 2,400 sq mi (Land: 2,398 sq mi; Water: 2 sq mi)
Time Zone Mountain Time Zone (MT)
State Wyoming
Coordinates 43.8354° N, 104.5660° W
Major Landmarks Black Hills National Forest, Salt Creek Oil Field, Anna Miller Museum
Adjacent Counties (and Direction) Crook County (North), Lawrence County, South Dakota (Northeast), Pennington County, South Dakota (East), Custer County, South Dakota (Southeast), Niobrara County (South), Converse County (Southwest), Campbell County (West)
Population Approximately 7,000
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