RANKING · 2020 CENSUS · 39 SHOWN OF 39

Highest Portuguese population share, Montana counties · 2020

Montana counties ranked by the share of all residents who are Portuguese ancestry (2020 American Community Survey). A concentration measure: Portuguese residents as a percentage of total population. This list covers the 39 counties in Montana that qualify, ranked against each other statewide.

Portuguese Americans: full group profile →

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SAME RANKING BYCities 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

RANKPLACESTATEPOPPORTUGUESE SHAREVS 2010

01Prairie County, MTMT1,1121.5%–

02Madison County, MTMT10,0261.1%+0.6 pts

03Treasure County, MTMT7281.0%–

04Mineral County, MTMT5,1850.5%+0.4 pts

05Custer County, MTMT12,0340.4%+0.4 pts

06Gallatin County, MTMT128,7400.3%−0.0 pts

07Beaverhead County, MTMT10,0430.3%+0.2 pts

08Sanders County, MTMT14,0620.3%−0.1 pts

09Judith Basin County, MTMT2,1620.3%–

10Rosebud County, MTMT8,2530.3%–

11Missoula County, MTMT123,5130.3%−0.0 pts

12Broadwater County, MTMT8,4930.2%–

13Park County, MTMT18,2140.2%−0.4 pts

14Teton County, MTMT6,4960.2%−0.1 pts

15Lewis and Clark County, MTMT75,3310.2%−0.4 pts

16Flathead County, MTMT115,4290.2%−0.1 pts

17Sweet Grass County, MTMT3,7620.2%–

18McCone County, MTMT1,7200.2%–

19Deer Lodge County, MTMT9,7090.1%+0.0 pts

20Stillwater County, MTMT9,4450.1%–

21Yellowstone County, MTMT172,6920.1%+0.1 pts

22Liberty County, MTMT1,9570.1%–

23Granite County, MTMT3,6580.1%−0.3 pts

24Ravalli County, MTMT48,5820.1%−0.5 pts

25Hill County, MTMT16,1670.1%+0.1 pts

26Carbon County, MTMT11,4660.1%−0.2 pts

27Lake County, MTMT33,3920.1%−0.2 pts

28Powell County, MTMT7,1570.1%−0.1 pts

29Toole County, MTMT5,2110.1%–

30Silver Bow County, MTMT36,1180.1%−0.1 pts

31Richland County, MTMT11,3770.1%–

32Cascade County, MTMT85,0290.1%−0.2 pts

33Jefferson County, MTMT13,3290.0%+0.0 pts

34Dawson County, MTMT8,6920.0%–

35Pondera County, MTMT6,0720.0%–

36Sheridan County, MTMT3,4360.0%–

37Roosevelt County, MTMT10,2420.0%+0.0 pts

38Chouteau County, MTMT5,8650.0%−0.3 pts

39Valley County, MTMT7,3850.0%–

SHOWING 1–39 OF 39

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS