 The state also has five Micropolitan Statistical Areas centered on Bozeman, Butte, Helena, Kalispell and Havre.These communities, excluding Havre, are colloquially known as the "big 7" Montana cities, as they are consistently the seven largest communities in Montana, with a significant population difference when these communities are compared to those 8th or lower on the list.According to the 2010 U.S. Census, the population of Montana's seven most populous cities, in rank order, are Billings, Missoula, Great Falls, Bozeman, Butte, Helena and Kalispell.