RANKING · 2010 CENSUS · 34 SHOWN OF 34

Highest Australian population share, Iowa counties · 2010

Iowa counties ranked by the share of all residents who are Australian ancestry (2010 American Community Survey). A concentration measure: Australian residents as a percentage of total population. This list covers the 34 counties in Iowa that qualify, ranked against each other statewide. The median across all 34 is 0.1%.

Australian Americans: full group profile →

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

YEAR2010 2020 2024

Highest Australian population share by state

RANKPLACESTATEPOPAUSTRALIAN SHAREVS –

01O'Brien County, IAIA14,2200.5%–

02Monona County, IAIA8,5390.5%–

03Jefferson County, IAIA15,2910.3%–

04Franklin County, IAIA9,8680.1%–

05Calhoun County, IAIA9,5620.1%–

06Fremont County, IAIA6,5220.1%–

07Van Buren County, IAIA7,1310.1%–

08Cerro Gordo County, IAIA42,3720.1%–

09Sioux County, IAIA36,7740.1%–

10Warren County, IAIA57,3310.1%–

11Carroll County, IAIA20,3030.1%–

12Bremer County, IAIA25,2960.1%–

13Cherokee County, IAIA11,3690.1%–

14Worth County, IAIA7,3380.1%–

15Poweshiek County, IAIA18,3680.1%–

16Woodbury County, IAIA106,6490.1%–

17Scott County, IAIA175,2590.1%–

18Decatur County, IAIA7,6550.0%–

19Clay County, IAIA16,2020.0%–

20Pocahontas County, IAIA6,8190.0%–

21Polk County, IAIA516,5460.0%–

22Buena Vista County, IAIA20,4490.0%–

23Des Moines County, IAIA38,0770.0%–

24Wapello County, IAIA35,2100.0%–

25Lee County, IAIA32,3060.0%–

26Henry County, IAIA19,3490.0%–

27Marion County, IAIA34,1920.0%–

28Hardin County, IAIA16,4550.0%–

29Johnson County, IAIA160,0440.0%–

30Cass County, IAIA12,9600.0%–

31Pottawattamie County, IAIA92,9960.0%–

32Tama County, IAIA16,7960.0%–

33Linn County, IAIA232,0280.0%–

34Story County, IAIA101,2910.0%–

SHOWING 1–34 OF 34

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS