RANKING · 2020 CENSUS · 27 SHOWN OF 27

Fastest shrinking, Montana cities · 2020

Montana cities with the steepest population decline from the 2010 census to 2020. This list covers the 27 cities in Montana that qualify, ranked against each other statewide.

Flip the list · Fastest growing, US cities →

MontanaAll statesPop > 5KAll rankings

SAME RANKING BYCounties States Metros

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

YEAR2000 2010 2020 2024

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

Download CSV (full list, 27 rows)

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