RANKING · 2024 ACS · 101 SHOWN OF 101

Largest Welsh population, Illinois counties

Illinois counties ranked by the number of residents who are Welsh ancestry, from the 2024 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.

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 2010

01Cook County, ILIL5,194,62510,585−21%

02DuPage County, ILIL934,2983,130−29%

03Lake County, ILIL719,3391,902−38%

04Will County, ILIL712,2531,854−22%

05Kane County, ILIL525,7571,633−39%

06Madison County, ILIL263,1101,422−25%

07Peoria County, ILIL178,5531,209−2%

08Sangamon County, ILIL194,1701,202−23%

09Champaign County, ILIL209,9721,078−8%

10St. Clair County, ILIL250,7081,066−29%

11Winnebago County, ILIL283,6741,005−28%

12McLean County, ILIL171,419990−21%

13McHenry County, ILIL317,751963−36%

14Rock Island County, ILIL141,869857+36%

15LaSalle County, ILIL107,773697+25%

16Tazewell County, ILIL130,049591+6%

17Kendall County, ILIL145,470428−37%

18Marion County, ILIL36,382420+23%

19DeKalb County, ILIL101,835405−25%

20Boone County, ILIL53,568360+30%

21Franklin County, ILIL36,916353+41%

22Macon County, ILIL99,300324−34%

23Henry County, ILIL48,095297+0%

24Williamson County, ILIL67,225295−34%

25Coles County, ILIL46,607283+4%

26Adams County, ILIL64,267279+20%

27Vermilion County, ILIL71,259273−56%

28Bureau County, ILIL32,510272+81%

29Ogle County, ILIL51,399250+60%

30Macoupin County, ILIL43,748229−11%

31Whiteside County, ILIL54,121229+101%

32Morgan County, ILIL32,515208+84%

33Jackson County, ILIL52,501196−26%

34Woodford County, ILIL38,111196−14%

35Jefferson County, ILIL36,147187−5%

36Fayette County, ILIL20,790185+106%

37McDonough County, ILIL25,916182−32%

38Warren County, ILIL16,222181+63%

39Saline County, ILIL22,772174−45%

40Stephenson County, ILIL43,220171+0%

41Piatt County, ILIL16,791155+74%

42Kankakee County, ILIL105,525152−73%

43Lee County, ILIL32,914152+6%

44Monroe County, ILIL34,840147+32%

45Knox County, ILIL47,767146−59%

46Jo Daviess County, ILIL21,594145−16%

47Montgomery County, ILIL28,076144+62%

48Randolph County, ILIL29,921141+18%

49Carroll County, ILIL15,419137+154%

50Massac County, ILIL13,502135+63%

51Iroquois County, ILIL26,150126−17%

52Crawford County, ILIL18,648111−27%

53Grundy County, ILIL54,052108−78%

54Logan County, ILIL27,182104−44%

55Effingham County, ILIL34,519102+5%

56Fulton County, ILIL32,901102−70%

57Perry County, ILIL20,160100−50%

58Moultrie County, ILIL14,37197+37%

59Douglas County, ILIL19,88094−4%

60Clinton County, ILIL37,12893−4%

61Christian County, ILIL33,44393−18%

62Schuyler County, ILIL6,65793+232%

63Mercer County, ILIL15,22990−27%

64Mason County, ILIL12,41187+335%

65Marshall County, ILIL11,47379−33%

66Hamilton County, ILIL7,85969+2200%

67Pike County, ILIL14,23169−32%

68Johnson County, ILIL13,36367+139%

69Hancock County, ILIL16,80362−42%

70Stark County, ILIL5,31962+7%

71White County, ILIL13,25060−45%

72Greene County, ILIL11,31355−60%

73Henderson County, ILIL5,98454+200%

74De Witt County, ILIL15,11853−50%

75Shelby County, ILIL20,57649−48%

76Livingston County, ILIL35,05744−75%

77Cumberland County, ILIL10,20841−59%

78Union County, ILIL16,65639−70%

79Richland County, ILIL15,21938−5%

80Edwards County, ILIL5,89836−43%

81Jersey County, ILIL21,16036−49%

82Edgar County, ILIL16,32335−40%

83Washington County, ILIL13,56435−87%

84Bond County, ILIL16,95931−78%

85Brown County, ILIL6,40125–

86Ford County, ILIL13,21624−14%

87Lawrence County, ILIL13,79022−55%

88Wayne County, ILIL15,88221−16%

89Pope County, ILIL3,67217−35%

90Clay County, ILIL12,79316−72%

91Menard County, ILIL11,86314−80%

92Putnam County, ILIL5,61914−61%

93Cass County, ILIL12,46313−62%

94Gallatin County, ILIL4,61613−50%

95Wabash County, ILIL10,90713−70%

96Pulaski County, ILIL4,82012+300%

97Clark County, ILIL15,11410−93%

98Scott County, ILIL4,86610−77%

99Jasper County, ILIL9,0329−90%

100Calhoun County, ILIL4,3008+167%

101Alexander County, ILIL4,5708−67%

SHOWING 1–101 OF 101

Download CSV (full list, 101 rows)

UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES