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 (2023 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.

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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 2000

01Prairie County, MTMT1,1121.5%–

02Madison County, MTMT10,0261.1%–

03Treasure County, MTMT7281.0%–

04Mineral County, MTMT5,1850.5%–

05Custer County, MTMT12,0340.4%–

06Gallatin County, MTMT128,7400.3%–

07Beaverhead County, MTMT10,0430.3%–

08Sanders County, MTMT14,0620.3%–

09Judith Basin County, MTMT2,1620.3%–

10Rosebud County, MTMT8,2530.3%–

11Missoula County, MTMT123,5130.3%–

12Broadwater County, MTMT8,4930.2%–

13Park County, MTMT18,2140.2%–

14Teton County, MTMT6,4960.2%–

15Lewis and Clark County, MTMT75,3310.2%–

16Flathead County, MTMT115,4290.2%–

17Sweet Grass County, MTMT3,7620.2%–

18McCone County, MTMT1,7200.2%–

19Deer Lodge County, MTMT9,7090.1%–

20Stillwater County, MTMT9,4450.1%–

21Yellowstone County, MTMT172,6920.1%–

22Liberty County, MTMT1,9570.1%–

23Granite County, MTMT3,6580.1%–

24Ravalli County, MTMT48,5820.1%–

25Hill County, MTMT16,1670.1%–

26Carbon County, MTMT11,4660.1%–

27Lake County, MTMT33,3920.1%–

28Powell County, MTMT7,1570.1%–

29Toole County, MTMT5,2110.1%–

30Silver Bow County, MTMT36,1180.1%–

31Richland County, MTMT11,3770.1%–

32Cascade County, MTMT85,0290.1%–

33Jefferson County, MTMT13,3290.0%–

34Dawson County, MTMT8,6920.0%–

35Pondera County, MTMT6,0720.0%–

36Sheridan County, MTMT3,4360.0%–

37Roosevelt County, MTMT10,2420.0%–

38Chouteau County, MTMT5,8650.0%–

39Valley County, MTMT7,3850.0%–

SHOWING 1–39 OF 39

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UPDATED 2026-06-06 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES