Skip to content
Home » US States » H-L » Idaho » Boise County

Boise County

Boise County is named for the Boise River, which was named by French Canadian explorers and trappers for the great variety of trees along its bank and “boise” is the French word for “wooded”.


Surrounding County Courthouses: 

N – Valley County

E – Custer County and Blaine County

S – Elmore County

W – Ada County and Gem County


Created:  February 4, 1864                                                        Map of Idaho highlighting Boise County

County Seat: 

Idaho City  1864 – present


County Courthouse – Idaho City 


Location:  419 Main Street / Wall Street

Built:  1871

Style:  Federal

Architect:  C S Kingsley and E A Kingsley

Contractor:  C S Kingsley and E A Kingsley


Description:  The building  faces east and is a one story red colored brick and wood structure. The building was constructed as a general store and was bought by the County in 1909. A porch extends around three sides and is supported by thin posts. The slanted roof is colored blue.


See:  The 4th Judicial District includes Ada CountyElmore County and Valley County.


Note:  The courthouse is the oldest courthouse in Idaho still used as a courthouse.



County Courthouse – Idaho City









Photos taken 2009