Idaho is divided into 44 counties, each serving as a local government unit. The largest county by area is Bannock County, while the most populous is Ada County, home to the state capital, Boise. Each county has its own elected officials and provides various services to residents, including law enforcement, education, and infrastructure. Counties in Idaho vary widely in geography and population. For example, Custer County is known for its rugged mountains and outdoor recreation, while Twin Falls County features the scenic Snake River. This diversity contributes to the unique character of each county within the state.