There are 56 counties in Montana. Two counties are not considered to be functioning governmental units because each has consolidated its functions with an incorporated place. Deer Lodge County and Anaconda-Deer Lodge County (place) are governmentally consolidated. Silver Bow County and Butte-Silver Bow (place) are governmentally consolidated. The remaining 54 counties are each governed by a county board of commissioners.
Yellowstone National Park was deleted as a county equivalent when its area legally became part of Gallatin and Park Counties on November 7, 1997.
There are 194 county subdivisions in Montana. They are all census county divisions (CCDs), which are delineated for statistical purposes, have no legal function, and are not governmental units. CCDs were first established in Montana for the 1960 census. Prior to 1960, the minor civil divisions used in the census included election precincts, election districts, townships, land survey townships, American Indian reservations, and school districts.