Campbell County is named for John Allen Campbell, who was the first Governor of the Wyoming Territory.
Created: February 13, 1911
County Seat:
Gillette 1911 – present
County Courthouse – Gillette
Location: 500 Gillette Avenue / West 5th Street
Built: 1970 – 1971
Style: Modern
Architect: Henry Therkildsen
Contractor: Spiegelberg Lumber & Building Company
Description: The building faces east and is a one story brown colored brick structure. The east front has a central entrance on the first story which projects from the main building and has flagstone vertical sections on each side of the entrance. There are white colored concrete blocks around the windows. The roof line is flat. A new section was added on the south side in 2005. The architect was Schultz Foss Architects and the contractor was Van Ewing Construction Inc.
Courthouses:
N – Powder River County, Montana
E – Crook County and Weston County
S – Converse County
W – Johnson County and Sheridan County









Photos taken 2009