Montana State Population 2024. This makes montana the 3rd least densely populated state in the us. Since the 2020 census, which counted the state’s population as of april 1, 2020, the agency estimates that montana’s population has grown by about 48,600 residents — slightly.
The montana population surpassed 1 million for the first time in 2012, and it now stands at 1.03 million. Chart and table of population level and growth rate for the state of montana from 1900 to 2023.