It is centered around Billings in the south central portion of Montana and has a population is 184,167 as of 2020.

[1] It includes Carbon, Stillwater and Yellowstone counties,[2] and has one of the geographically largest trade, cultural, business and medical areas in the United States; this includes all of Montana.

As of the census[3] of 2000, there are 138,904 people, 56,149 households, and 36,926 families residing within the MSA.

The racial makeup of the MSA was 93.08% White, 0.43% African American, 2.89% Native American, 0.53% Asian, 0.04% Pacific Islander, 1.22% from other races, and 1.81% from two or more races.

Males had a median income of $31,851 versus $20,756 for females.