RANKING · 2020 CENSUS · 27 SHOWN OF 27

Most population lost, Montana cities · 2020

Montana cities that lost the most residents from the 2010 census to 2020, by raw count of people rather than percentage. 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

YEAR2000 2010 2020 2024

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01Miles City, MTMT8,450-56−315%

02Lewistown, MTMT6,179+51−121%

03Havre, MTMT9,264+52−107%

04Anaconda-Deer Lodge County, MTMT9,709+123−114%

05Orchard Homes, MTMT5,588+180−104%

06Hamilton, MTMT5,451+311−68%

07Lockwood, MTMT7,181+398+17%

08Laurel, MTMT7,205+504−11%

09Evergreen, MTMT9,611+533−75%

10Columbia Falls, MTMT5,753+620+13%

11Polson, MTMT5,653+660−16%

12Helena Valley West Central, MTMT8,056+787+20%

13Bigfork, MTMT5,565+848–

14Helena Valley Southeast, MTMT9,108+941−63%

15Butte-Silver Bow, MTMT35,469+969+66%

16Livingston, MTMT9,290+996+564%

17Sidney, MTMT6,217+1,155−361%

18Helena Valley Northwest, MTMT5,183+1,223+44%

19Whitefish, MTMT9,358+1,394+110%

20Great Falls, MTMT60,208+1,937+22%

21Four Corners, MTMT5,791+2,755–

22Belgrade, MTMT13,107+3,071+33%

23Helena, MTMT35,138+3,901+172%

24Kalispell, MTMT31,851+4,631+101%

25Missoula, MTMT78,903+6,701−53%

26Billings, MTMT121,239+12,946+49%

27Bozeman, MTMT58,814+16,013+230%

SHOWING 1–27 OF 27

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS