population of billings
Billings is located in the south-central portion of the state and is the seat of Yellowstone County, which had a 2015 population of 157,048. The 2015 Census estimates put the Billings population at 110,263, making it the only city in Montana with over 100,000 people. The city is experiencing rapid growth and a strong economy; it has had and is continuing to have the largest growth of any city in Montana.