RANKING · 2020 CENSUS · 27 SHOWN OF 27

Largest Irish population, Montana cities · 2020

Montana cities ranked by the number of residents who are Irish ancestry, from the 2020 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 27 cities in Montana that qualify, ranked against each other statewide.

Irish Americans: full group profile →

MontanaAll statesPop > 5KAll rankings

SAME RANKING BYCounties States Metros

RELATEDLargest American population Highest American population share Largest Arab population Highest Arab population share Largest Egyptian population Highest Egyptian population share

YEAR2010 2020 2024

RANKPLACESTATEPOPIRISH POPULATIONVS 2010

01Billings, MTMT121,23912,881−10%

02Missoula, MTMT78,90311,992+6%

03Butte-Silver Bow, MTMT35,4698,728−18%

04Great Falls, MTMT60,2087,146−25%

05Bozeman, MTMT58,8146,941−5%

06Helena, MTMT35,1385,960+15%

07Kalispell, MTMT31,8513,268+17%

08Anaconda-Deer Lodge County, MTMT9,7092,020−17%

09Helena Valley Southeast, MTMT9,1081,611+8%

10Lockwood, MTMT7,1811,439+29%

11Livingston, MTMT9,2901,297+8%

12Evergreen, MTMT9,6111,285+21%

13Miles City, MTMT8,4501,264−22%

14Belgrade, MTMT13,1071,247−11%

15Havre, MTMT9,2641,049−25%

16Sidney, MTMT6,2171,043+76%

17Helena Valley West Central, MTMT8,056969−41%

18Whitefish, MTMT9,358881−13%

19Polson, MTMT5,653864+46%

20Columbia Falls, MTMT5,753850+30%

21Laurel, MTMT7,205796−13%

22Helena Valley Northwest, MTMT5,183794+57%

23Lewistown, MTMT6,179792−9%

24Orchard Homes, MTMT5,588692−57%

25Bigfork, MTMT5,565566−12%

26Hamilton, MTMT5,451465−29%

27Four Corners, MTMT5,791454+15%

SHOWING 1–27 OF 27

Download CSV (full list, 27 rows)

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