The U.S. currently has seven statistical areas that have been delineated by the Office of Management and Budget (OMB). On July 21, 2023, the OMB delineated five metropolitan statistical areas and two micropolitan statistical areas in Montana. As of 2025, the largest of these is the Billings, MT MSA, comprising the area surrounding Montana's largest city of Billings.
+The seven United States statistical areas and 56 counties of the State of MontanaCore-based statistical area2025 population (est.)County2025 population (est.)Billings, MT MSA193,603Yellowstone County, Montana172,692Carbon County, Montana11,466Stillwater County, Montana9,445Bozeman, MT MSA128,740Gallatin County, Montana128,740Missoula, MT MSA128,698Missoula County, Montana123,513Mineral County, Montana5,185Kalispell, MT μSA115,429Flathead County, Montana115,429Helena, MT MSA97,153Lewis and Clark County, Montana75,331Jefferson County, Montana13,329Broadwater County, Montana8,493Great Falls, MT MSA85,029Cascade County, Montana85,029Butte-Silver Bow, MT μSA36,118Silver Bow County, Montana36,118noneRavalli County, Montana48,582Lake County, Montana33,392Lincoln County, Montana22,328Park County, Montana18,214Hill County, Montana16,167Sanders County, Montana14,062Glacier County, Montana13,463Big Horn County, Montana12,752Custer County, Montana12,034Fergus County, Montana11,825Richland County, Montana11,377Roosevelt County, Montana10,242Beaverhead County, Montana10,043Madison County, Montana10,026Deer Lodge County, Montana9,709Dawson County, Montana8,692Rosebud County, Montana8,253Valley County, Montana7,385Powell County, Montana7,157Blaine County, Montana6,860Teton County, Montana6,496Pondera County, Montana6,072Chouteau County, Montana5,865Musselshell County, Montana5,582Toole County, Montana5,211Phillips County, Montana4,203Sweet Grass County, Montana3,762Granite County, Montana3,658Sheridan County, Montana3,436Fallon County, Montana2,959Judith Basin County, Montana2,162Meagher County, Montana2,137Wheatland County, Montana2,100Liberty County, Montana1,957Powder River County, Montana1,781McCone County, Montana1,720Daniels County, Montana1,612Carter County, Montana1,383Garfield County, Montana1,148Prairie County, Montana1,112Wibaux County, Montana885Golden Valley County, Montana844Treasure County, Montana728Petroleum County, Montana548State of Montana1,144,694
+The seven core-based statistical areas of the State of Montana2025 rankCore-based statistical areaPopulation2025 estimateChange2020 CensusChange2010 CensusBillings, MT MSABozeman, MT MSAMissoula, MT MSAKalispell, MT μSAHelena, MT MSAGreat Falls, MT MSAButte-Silver Bow, MT μSA
See also
Geography of Montana Demographics of Montana
Notes
References
External links
Office of Management and Budget United States Census Bureau