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.

Flip the list · Most population gained, US cities →

MontanaAll statesPop > 5KAll rankings

SAME RANKING BYCounties States Metros

YEAR2000 2010 2020 2024

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

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

02Sidney, MTMT6,217-175−60%

03Great Falls, MTMT60,208-113−107%

04Four Corners, MTMT5,791-110–

05Havre, MTMT9,264-104−85%

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

07Lockwood, MTMT7,181-14−104%

08Laurel, MTMT7,205-7−101%

09Miles City, MTMT8,450+53+104%

10Lewistown, MTMT6,179+135−157%

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

12Orchard Homes, MTMT5,588+211−104%

13Polson, MTMT5,653+280−64%

14Columbia Falls, MTMT5,753+307−44%

15Hamilton, MTMT5,451+442−54%

16Bigfork, MTMT5,565+447–

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

18Butte-Silver Bow, MTMT35,469+558−4%

19Livingston, MTMT9,290+740+393%

20Whitefish, MTMT9,358+998+50%

21Belgrade, MTMT13,107+1,412−39%

22Evergreen, MTMT9,611+1,462−31%

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

24Billings, MTMT121,239+2,318−73%

25Bozeman, MTMT58,814+2,821−42%

26Missoula, MTMT78,903+3,025−79%

27Kalispell, MTMT31,851+3,946+71%

SHOWING 1–27 OF 27

Download CSV (full list, 27 rows)

UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES