Boundary County, as of 2013, has a population of 10,853 residents with an area of 1,268.56 sq. miles. Bonner Ferry is the county seat, with Porthill, East Port, Moyie Springs and Naples being the larger towns within the county. The Idaho Panhandle National Forest and McArthur Lake are within Boundary County.
McArthur Lake shares its borders with Bonner County to the south.