AreaVibes reveals the best places to live in Montana for 2016 using our Livability Score. The Livability Score for each city in Montana is calculated out of 100 from a unique algorithm based on various metrics, including: amenities, cost of living, crime, education, employment, housing and weather. Montana has a population of 990,785 and a population density of 6.8 people per square mile. The capital city is Helena and the largest city in Montana is Billings. To filter the results, use the dropdown options to sort by population or category.