RANKING · 2010 CENSUS · 101 SHOWN OF 101

Largest Welsh population, Illinois counties · 2010

Illinois counties ranked by the number of residents who are Welsh ancestry, from the 2010 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 101 counties in Illinois that qualify, ranked against each other statewide. The median across all 101 is 137.

Welsh 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

RANKPLACESTATEPOPWELSH POPULATIONVS –

01Cook County, ILIL5,194,62513,391–

02DuPage County, ILIL934,2984,401–

03Lake County, ILIL719,3393,046–

04Kane County, ILIL525,7572,658–

05Will County, ILIL712,2532,372–

06Madison County, ILIL263,1101,891–

07Sangamon County, ILIL194,1701,561–

08McHenry County, ILIL317,7511,494–

09St. Clair County, ILIL250,7081,491–

10Winnebago County, ILIL283,6741,387–

11McLean County, ILIL171,4191,248–

12Peoria County, ILIL178,5531,236–

13Champaign County, ILIL209,9721,172–

14Kendall County, ILIL145,470675–

15Rock Island County, ILIL141,869632–

16Vermilion County, ILIL71,259616–

17Kankakee County, ILIL105,525566–

18LaSalle County, ILIL107,773556–

19Tazewell County, ILIL130,049556–

20DeKalb County, ILIL101,835539–

21Grundy County, ILIL54,052489–

22Macon County, ILIL99,300488–

23Williamson County, ILIL67,225449–

24Knox County, ILIL47,767359–

25Marion County, ILIL36,382342–

26Fulton County, ILIL32,901339–

27Saline County, ILIL22,772314–

28Henry County, ILIL48,095297–

29Boone County, ILIL53,568276–

30Coles County, ILIL46,607272–

31Washington County, ILIL13,564272–

32McDonough County, ILIL25,916266–

33Jackson County, ILIL52,501264–

34Macoupin County, ILIL43,748256–

35Franklin County, ILIL36,916250–

36Adams County, ILIL64,267232–

37Woodford County, ILIL38,111227–

38Perry County, ILIL20,160199–

39Jefferson County, ILIL36,147197–

40Logan County, ILIL27,182185–

41Livingston County, ILIL35,057177–

42Jo Daviess County, ILIL21,594173–

43Stephenson County, ILIL43,220171–

44Ogle County, ILIL51,399156–

45Crawford County, ILIL18,648152–

46Iroquois County, ILIL26,150152–

47Bureau County, ILIL32,510150–

48Lee County, ILIL32,914143–

49Bond County, ILIL16,959140–

50Greene County, ILIL11,313138–

51Clark County, ILIL15,114137–

52Union County, ILIL16,656129–

53Mercer County, ILIL15,229123–

54Randolph County, ILIL29,921119–

55Marshall County, ILIL11,473118–

56Whiteside County, ILIL54,121114–

57Christian County, ILIL33,443113–

58Morgan County, ILIL32,515113–

59Monroe County, ILIL34,840111–

60Warren County, ILIL16,222111–

61White County, ILIL13,250109–

62De Witt County, ILIL15,118107–

63Hancock County, ILIL16,803107–

64Pike County, ILIL14,231102–

65Cumberland County, ILIL10,208100–

66Douglas County, ILIL19,88098–

67Clinton County, ILIL37,12897–

68Effingham County, ILIL34,51997–

69Shelby County, ILIL20,57694–

70Fayette County, ILIL20,79090–

71Montgomery County, ILIL28,07689–

72Piatt County, ILIL16,79189–

73Jasper County, ILIL9,03286–

74Massac County, ILIL13,50283–

75Menard County, ILIL11,86371–

76Moultrie County, ILIL14,37171–

77Jersey County, ILIL21,16070–

78Edwards County, ILIL5,89863–

79Edgar County, ILIL16,32358–

80Stark County, ILIL5,31958–

81Clay County, ILIL12,79357–

82Carroll County, ILIL15,41954–

83Lawrence County, ILIL13,79049–

84Hardin County, ILIL3,58848–

85Scott County, ILIL4,86643–

86Wabash County, ILIL10,90743–

87Richland County, ILIL15,21940–

88Putnam County, ILIL5,61936–

89Cass County, ILIL12,46334–

90Ford County, ILIL13,21628–

91Johnson County, ILIL13,36328–

92Schuyler County, ILIL6,65728–

93Gallatin County, ILIL4,61626–

94Pope County, ILIL3,67226–

95Wayne County, ILIL15,88225–

96Alexander County, ILIL4,57024–

97Mason County, ILIL12,41120–

98Henderson County, ILIL5,98418–

99Calhoun County, ILIL4,3003–

100Hamilton County, ILIL7,8593–

101Pulaski County, ILIL4,8203–

SHOWING 1–101 OF 101

Download CSV (full list, 101 rows)

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