It continues to be Montana's most populous county. The other four most populous counties are: Missoula, 109,299 for an increase of 14.1 percent over the decade; Flathead, 90,928, for an increase of 22.1 percent; Gallatin, 89,513, for an increase of 32 percent; and Cascade, 81,327, for an increase of 1.2 percent.