Treasure County is named for the rich mineral resources in the area and promotionally to attract new settlers.
Surrounding County Courthouses:
N – Rosebud County
E – Rosebud County
S – Big Horn County
W – Yellowstone County and Musselshell County
Created: February 7, 1919 
County Seat:
Hysham 1919 – present
County Courthouse – Hysham
Location: 307 Rapelje Avenue / Spurling Street
Built: 1959 – 1960
Style: Modern
Architect: Morrison-Maierle & Associates
Contractor: Cerovski Cement Products of Lewistown
Description: The building faces north and is a one story red colored brick, concrete and glass structure. The building is located on landscaped grounds in the center of Hysham. The building has a projecting entrance section on the north side with glass walls and doorways. There is another entrance on the southwest side where a map of the county is outlined in brick on the west side wall. The building has a flat roof line. In the interior, the walls are brick. The County District Court courtroom is located at the northwest corner near the main entrance. The building contains the County District Court of the 16th Judicial District and the County Justice Court.
See: The 16th Judicial District includes Carter County, Custer County, Fallon County, Garfield County, Powder River County, Rosebud County and Treasure County.
History: The county was created in 1919 and Hysham was selected as the county seat. The county used rented premises. The courthouse was constructed in 1959 to 1960.
County Courthouse - Hysham
Photos taken 2009, 2015 and 2022