RANKING · 2020 CENSUS · 39 SHOWN OF 39

Largest Portuguese population, Montana counties · 2020

Montana counties ranked by the number of residents who are Portuguese 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 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 POPULATIONVS 2010

01Gallatin County, MTMT128,740370+16%

02Missoula County, MTMT123,513301−4%

03Yellowstone County, MTMT172,692211+97%

04Flathead County, MTMT115,429203−20%

05Lewis and Clark County, MTMT75,331156−56%

06Madison County, MTMT10,02696+140%

07Ravalli County, MTMT48,58252−80%

08Custer County, MTMT12,03452+420%

09Cascade County, MTMT85,02951−80%

10Park County, MTMT18,21438−62%

11Sanders County, MTMT14,06236−25%

12Beaverhead County, MTMT10,04329+107%

13Lake County, MTMT33,39227−64%

14Silver Bow County, MTMT36,11826−41%

15Rosebud County, MTMT8,25323–

16Mineral County, MTMT5,18521+600%

17Hill County, MTMT16,16719+171%

18Prairie County, MTMT1,11217–

19Teton County, MTMT6,49614−30%

20Broadwater County, MTMT8,49314–

21Stillwater County, MTMT9,44513–

22Deer Lodge County, MTMT9,70913+8%

23Carbon County, MTMT11,46612−57%

24Richland County, MTMT11,3778–

25Sweet Grass County, MTMT3,7627–

26Jefferson County, MTMT13,3296+20%

27Powell County, MTMT7,1576−45%

28Treasure County, MTMT7286–

29Judith Basin County, MTMT2,1625–

30Dawson County, MTMT8,6924–

31Toole County, MTMT5,2114–

32Granite County, MTMT3,6584−71%

33McCone County, MTMT1,7203–

34Roosevelt County, MTMT10,2423+50%

35Liberty County, MTMT1,9573–

36Pondera County, MTMT6,0722–

37Chouteau County, MTMT5,8651−94%

38Sheridan County, MTMT3,4361–

39Valley County, MTMT7,3851–

SHOWING 1–39 OF 39

Download CSV (full list, 39 rows)

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