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RANKING · 2024 ACS · 56 SHOWN OF 56

Highest Irish population share, Montana counties

Montana counties ranked by the share of all residents who are Irish ancestry (2024 American Community Survey). A concentration measure: Irish residents as a percentage of total population. This list covers the 56 counties in Montana that qualify, ranked against each other statewide.

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RELATEDLargest American populationHighest American population shareLargest Arab populationHighest Arab population shareLargest Egyptian populationHighest Egyptian population share
YEAR201020202024
Highest Irish population share by state
All USAlaskaAlabamaArkansasArizonaCaliforniaColoradoFloridaGeorgiaIowaIdahoIllinoisIndianaKansasKentuckyLouisianaMassachusettsMarylandMaineMichiganMinnesotaMissouriMississippiMontanaNorth CarolinaNorth DakotaNebraskaNew HampshireNew JerseyNew MexicoNevadaNew YorkOhioOklahomaOregonPennsylvaniaSouth CarolinaSouth DakotaTennesseeTexasUtahVirginiaVermontWashingtonWisconsinWest VirginiaWyoming
RANKPLACESTATEPOPIRISH SHAREVS 2010
01Silver Bow County, MTMT36,11824.8%−7.8 pts
02Deer Lodge County, MTMT9,70919.8%−6.4 pts
03Jefferson County, MTMT13,32919.0%−0.1 pts
04Park County, MTMT18,21418.5%+2.3 pts
05Madison County, MTMT10,02618.1%−0.7 pts
06Meagher County, MTMT2,13716.7%+3.1 pts
07Wheatland County, MTMT2,10016.5%+5.0 pts
08Broadwater County, MTMT8,49316.4%+0.9 pts
09Lewis and Clark County, MTMT75,33115.9%−3.4 pts
10Judith Basin County, MTMT2,16215.4%−0.8 pts
11Missoula County, MTMT123,51315.3%−2.5 pts
12Powell County, MTMT7,15715.0%−4.1 pts
13Phillips County, MTMT4,20315.0%+1.6 pts
14Prairie County, MTMT1,11214.6%+2.9 pts
15Garfield County, MTMT1,14814.6%−2.3 pts
16Beaverhead County, MTMT10,04314.4%−1.0 pts
17Dawson County, MTMT8,69214.1%−1.4 pts
18Carbon County, MTMT11,46614.0%−2.2 pts
19Stillwater County, MTMT9,44514.0%−0.2 pts
20Gallatin County, MTMT128,74013.7%−4.4 pts
21Toole County, MTMT5,21113.6%−4.0 pts
22Flathead County, MTMT115,42913.3%−1.5 pts
23Yellowstone County, MTMT172,69213.2%−0.7 pts
24Custer County, MTMT12,03413.0%−5.3 pts
25Cascade County, MTMT85,02912.8%−4.3 pts
26Carter County, MTMT1,38312.7%+0.4 pts
27Wibaux County, MTMT88512.5%−0.9 pts
28Sanders County, MTMT14,06212.5%−3.6 pts
29Teton County, MTMT6,49612.4%−2.1 pts
30Ravalli County, MTMT48,58212.4%−3.6 pts
31Liberty County, MTMT1,95712.2%−2.3 pts
32Treasure County, MTMT72812.0%+2.1 pts
33Granite County, MTMT3,65811.9%−8.3 pts
34Mineral County, MTMT5,18511.8%−5.2 pts
35Lincoln County, MTMT22,32811.5%−4.1 pts
36Musselshell County, MTMT5,58211.4%−4.7 pts
37Petroleum County, MTMT54811.2%−2.0 pts
38Sheridan County, MTMT3,43611.2%−0.4 pts
39Lake County, MTMT33,39211.1%−0.4 pts
40Daniels County, MTMT1,61211.0%+2.7 pts
41Richland County, MTMT11,37710.6%−2.4 pts
42Fergus County, MTMT11,82510.5%−2.3 pts
43McCone County, MTMT1,7209.8%−2.2 pts
44Sweet Grass County, MTMT3,7629.6%−3.3 pts
45Powder River County, MTMT1,7819.4%−4.6 pts
46Fallon County, MTMT2,9599.3%−15.5 pts
47Pondera County, MTMT6,0728.9%−4.3 pts
48Rosebud County, MTMT8,2538.6%+2.0 pts
49Valley County, MTMT7,3858.5%−3.9 pts
50Golden Valley County, MTMT8447.7%−10.7 pts
51Chouteau County, MTMT5,8657.1%−5.9 pts
52Hill County, MTMT16,1676.5%−6.2 pts
53Glacier County, MTMT13,4635.4%−1.8 pts
54Blaine County, MTMT6,8604.2%−2.4 pts
55Roosevelt County, MTMT10,2423.8%−2.2 pts
56Big Horn County, MTMT12,7523.7%−1.1 pts
SHOWING 1–56 OF 56
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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES