RANKING · 2024 ACS · 27 SHOWN OF 27

Most population lost, Montana cities

Montana cities that lost the most residents from the 2020 census to 2024, by raw count of people rather than percentage. This list covers the 27 cities in Montana that qualify, ranked against each other statewide. The median across all 27 is +307. Biggest climber in the top 100 since 2020: Great Falls, MT, up 17 places to #3.

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MontanaAll statesPop > 5KAll rankings

SAME RANKING BYCounties States Metros

RELATEDLargest by population Fastest growing Fastest shrinking Most population gained Most densely populated Most sparsely populated

YEAR2000 2010 2020 2024

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01▲11Helena Valley West Central, MTMT8,056-614−194%

02▲15Sidney, MTMT6,217-175−60%

03▲17Great Falls, MTMT60,208-113−107%

04▲17Four Corners, MTMT5,791-110–

05▼2Havre, MTMT9,264-104−85%

06▲8Helena Valley Southeast, MTMT9,108-60−102%

07Lockwood, MTMT7,181-14−104%

08Laurel, MTMT7,205-7−101%

09▼8Miles City, MTMT8,450+53+104%

10▼8Lewistown, MTMT6,179+135−157%

11▼7Anaconda-Deer Lodge County, MTMT9,709+176−120%

12▼7Orchard Homes, MTMT5,588+211−104%

13▼2Polson, MTMT5,653+280−64%

14▼4Columbia Falls, MTMT5,753+307−44%

15▼9Hamilton, MTMT5,451+442−54%

16▼3Bigfork, MTMT5,565+447–

17▲1Helena Valley Northwest, MTMT5,183+478−44%

18▼3Butte-Silver Bow, MTMT35,469+558−4%

19▼3Livingston, MTMT9,290+740+393%

20▼1Whitefish, MTMT9,358+998+50%

21▲1Belgrade, MTMT13,107+1,412−39%

22▼13Evergreen, MTMT9,611+1,462−31%

23Helena, MTMT35,138+1,548+8%

24▲2Billings, MTMT121,239+2,318−73%

25▲2Bozeman, MTMT58,814+2,821−42%

26▼1Missoula, MTMT78,903+3,025−79%

27▼3Kalispell, MTMT31,851+3,946+71%

SHOWING 1–27 OF 27

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES