Business planning by county

Montana county reference

56 counties and county equivalents in Montana. Search names or FIPS codes, compare Census geography and keep the original sources with your work.

• Beaverhead County

  Montana · FIPS 30001

  10,043 residents · 2025 estimate

• Big Horn County

  Montana · FIPS 30003

  12,752 residents · 2025 estimate

• Blaine County

  Montana · FIPS 30005

  6,860 residents · 2025 estimate

• Broadwater County

  Montana · FIPS 30007

  8,493 residents · 2025 estimate

• Carbon County

  Montana · FIPS 30009

  11,466 residents · 2025 estimate

• Carter County

  Montana · FIPS 30011

  1,383 residents · 2025 estimate

• Cascade County

  Montana · FIPS 30013

  85,029 residents · 2025 estimate

• Chouteau County

  Montana · FIPS 30015

  5,865 residents · 2025 estimate

• Custer County

  Montana · FIPS 30017

  12,034 residents · 2025 estimate

• Daniels County

  Montana · FIPS 30019

  1,612 residents · 2025 estimate

• Dawson County

  Montana · FIPS 30021

  8,692 residents · 2025 estimate

• Deer Lodge County

  Montana · FIPS 30023

  9,709 residents · 2025 estimate

• Fallon County

  Montana · FIPS 30025

  2,959 residents · 2025 estimate

• Fergus County

  Montana · FIPS 30027

  11,825 residents · 2025 estimate

• Flathead County

  Montana · FIPS 30029

  115,429 residents · 2025 estimate

• Gallatin County

  Montana · FIPS 30031

  128,740 residents · 2025 estimate

• Garfield County

  Montana · FIPS 30033

  1,148 residents · 2025 estimate

• Glacier County

  Montana · FIPS 30035

  13,463 residents · 2025 estimate

• Golden Valley County

  Montana · FIPS 30037

  844 residents · 2025 estimate

• Granite County

  Montana · FIPS 30039

  3,658 residents · 2025 estimate

• Hill County

  Montana · FIPS 30041

  16,167 residents · 2025 estimate

• Jefferson County

  Montana · FIPS 30043

  13,329 residents · 2025 estimate

• Judith Basin County

  Montana · FIPS 30045

  2,162 residents · 2025 estimate

• Lake County

  Montana · FIPS 30047

  33,392 residents · 2025 estimate

• Lewis and Clark County

  Montana · FIPS 30049

  75,331 residents · 2025 estimate

• Liberty County

  Montana · FIPS 30051

  1,957 residents · 2025 estimate

• Lincoln County

  Montana · FIPS 30053

  22,328 residents · 2025 estimate

• Madison County

  Montana · FIPS 30057

  10,026 residents · 2025 estimate

• McCone County

  Montana · FIPS 30055

  1,720 residents · 2025 estimate

• Meagher County

  Montana · FIPS 30059

  2,137 residents · 2025 estimate

• Mineral County

  Montana · FIPS 30061

  5,185 residents · 2025 estimate

• Missoula County

  Montana · FIPS 30063

  123,513 residents · 2025 estimate

• Musselshell County

  Montana · FIPS 30065

  5,582 residents · 2025 estimate

• Park County

  Montana · FIPS 30067

  18,214 residents · 2025 estimate

• Petroleum County

  Montana · FIPS 30069

  548 residents · 2025 estimate

• Phillips County

  Montana · FIPS 30071

  4,203 residents · 2025 estimate

• Pondera County

  Montana · FIPS 30073

  6,072 residents · 2025 estimate

• Powder River County

  Montana · FIPS 30075

  1,781 residents · 2025 estimate

• Powell County

  Montana · FIPS 30077

  7,157 residents · 2025 estimate

• Prairie County

  Montana · FIPS 30079

  1,112 residents · 2025 estimate

• Ravalli County

  Montana · FIPS 30081

  48,582 residents · 2025 estimate

• Richland County

  Montana · FIPS 30083

  11,377 residents · 2025 estimate

• Roosevelt County

  Montana · FIPS 30085

  10,242 residents · 2025 estimate

• Rosebud County

  Montana · FIPS 30087

  8,253 residents · 2025 estimate

• Sanders County

  Montana · FIPS 30089

  14,062 residents · 2025 estimate

• Sheridan County

  Montana · FIPS 30091

  3,436 residents · 2025 estimate

• Silver Bow County

  Montana · FIPS 30093

  36,118 residents · 2025 estimate

• Stillwater County

  Montana · FIPS 30095

  9,445 residents · 2025 estimate

• Sweet Grass County

  Montana · FIPS 30097

  3,762 residents · 2025 estimate

• Teton County

  Montana · FIPS 30099

  6,496 residents · 2025 estimate

• Toole County

  Montana · FIPS 30101

  5,211 residents · 2025 estimate

• Treasure County

  Montana · FIPS 30103

  728 residents · 2025 estimate

• Valley County

  Montana · FIPS 30105

  7,385 residents · 2025 estimate

• Wheatland County

  Montana · FIPS 30107

  2,100 residents · 2025 estimate

• Wibaux County

  Montana · FIPS 30109

  885 residents · 2025 estimate

• Yellowstone County

  Montana · FIPS 30111

  172,692 residents · 2025 estimate

Use the county data

Use a county reference when organizing a market-research brief, outreach territory or business calculation. County population gives geographic context; it does not measure the number of qualified customers.

These are geographic reference records, not contact lists or verified sales leads.

Geography: 2025 U.S. Census Gazetteer. Population: Vintage 2025 estimates, July 1, 2025. County equivalents include parishes, boroughs, independent cities and planning regions. Puerto Rico population is not supplied by this population file.