RANKING · 2020 CENSUS · 27 SHOWN OF 27

Fastest shrinking, Montana cities

Montana cities with the steepest population decline since the prior decennial census. This list covers the 27 cities in Montana that qualify, ranked against each other statewide.

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MontanaAll statesPop > 5KAll rankings

SAME RANKING BYCounties States Metros

RELATEDLargest by population Fastest growing Most densely populated Most sparsely populated Best broadband access Worst broadband access

YEAR2000 2010 2020

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Miles City, MTMT8,450-0.7%−317%

02Havre, MTMT9,264+0.6%−108%

03Lewistown, MTMT6,179+0.9%−122%

04Anaconda-Deer Lodge County, MTMT9,709+1.3%−116%

05Butte-Silver Bow, MTMT35,469+2.9%+65%

06Great Falls, MTMT60,208+3.3%+15%

07Orchard Homes, MTMT5,588+3.5%−107%

08Lockwood, MTMT7,181+5.9%−31%

09Evergreen, MTMT9,611+7.0%−86%

10Hamilton, MTMT5,451+7.2%−80%

11Laurel, MTMT7,205+7.5%−25%

12Helena Valley West Central, MTMT8,056+10.0%−4%

13Missoula, MTMT78,903+10.0%−70%

14Helena Valley Southeast, MTMT9,108+11.4%−79%

15Billings, MTMT121,239+12.4%+16%

16Columbia Falls, MTMT5,753+13.2%−25%

17Helena, MTMT35,138+13.8%+135%

18Livingston, MTMT9,290+14.1%+532%

19Polson, MTMT5,653+14.7%−39%

20Bigfork, MTMT5,565+19.9%–

21Whitefish, MTMT9,358+21.9%+44%

22Sidney, MTMT6,217+22.3%−362%

23Kalispell, MTMT31,851+23.2%+20%

24Helena Valley Northwest, MTMT5,183+35.1%−49%

25Belgrade, MTMT13,107+41.6%−39%

26Bozeman, MTMT58,814+43.0%+101%

27Four Corners, MTMT5,791+87.6%–

SHOWING 1–27 OF 27

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES