As of the 2000 Census, the population of Canyon County Idaho is, 131,441.
Benewah County Idaho was established in 1915.
Idaho County Idaho was established in 1864.
Canyon
The total area of Canyon County Idaho is, 590 sq mi, (1,528 km sq).
Bonneville County Idaho was established in 1911.
Butte County Idaho was established in 1917.
Boundary County Idaho was established in 1915.
Caribou County Idaho was established in 1919.
Cassia County Idaho was established in 1879.
Clark County Idaho was established in 1919.
Clearwater County Idaho was established in 1911.