Idaho County is named for a former steamer called “Idaho” which was launched on the Columbia River in 1860, and Idaho is a Shoshone Indian name of a purple columbine common in the region.
Surrounding County Courthouses:
N – Nez Perce County, Lewis County, Clearwater County and Missoula County, Montana
E – Ravalli County, Montana and Lemhi County
S – Valley County and Adams County
W – Wallowa County, Oregon
Created: February 4, 1864 
County Seat:
Florence 1864 – 1875
Mount Idaho 1875 – 1902
Grangeville 1902 – present
County Courthouse – Grangeville
Location: 320 West Main Street / South College Street
Built: 1953 – 1954
Style: Modern
Architect: Whitehouse & Price & Associates
Contractor: Bill Humphreys & Company
Description: The building faces north and is a two story gray colored concrete and glass structure. The rectangular shaped building is located on landscaped grounds in the center of Grangeville. The north front has a central entrance which rises to a peak above the roof line. There is a center divider with the entrance on the east side and recessed glass on the west side. The windows are horizontal with red colored brick dividers across the north front. In the interior, the County District Court courtroom is located on the north side of the second story at the center of the building. The County Magistrate Court courtroom is located on the south side of the second story. The building houses the County District Court and County Magistrate Court of the 2nd Judicial District.
See: The 2nd Judicial District includes Clearwater County, Latah County, Lewis County and Nez Perce County.
History: The county was created in 1864 and Florence was selected as the county seat. The first courthouse was a log structure erected in Florence in 1862 as the Masonic Lodge. In 1869, the county seat was moved to Warren and in 1875 to Mount Idaho. In 1902 the county seat was moved to Grangeville and the second courthouse was a two story structure built in 1902. The third and present courthouse was constructed in 1953 to 1954.
County Courthouse – Grangeville
County District Court courtroom
County Magistrate Court courtroom
Photos taken 2009 and 2022