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. The median across all 101 is 126. Biggest climber in the top 100 since 2020: Fayette County, IL, up 42 places to #36.

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IllinoisAll states All rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPWELSH POPULATIONVS 2010

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

02DuPage County, ILIL934,2983,130−29%

03▲1Lake County, ILIL719,3391,902−38%

04▼1Will County, ILIL712,2531,854−22%

05▲1Kane County, ILIL525,7571,633−39%

06▼1Madison County, ILIL263,1101,422−25%

07▲1Peoria County, ILIL178,5531,209−2%

08▲1Sangamon County, ILIL194,1701,202−23%

09▲3Champaign County, ILIL209,9721,078−8%

10▼3St. Clair County, ILIL250,7081,066−29%

11▼1Winnebago County, ILIL283,6741,005−28%

12▲2McLean County, ILIL171,419990−21%

13▼2McHenry County, ILIL317,751963−36%

14▲1Rock Island County, ILIL141,869857+36%

15▲11LaSalle County, ILIL107,773697+25%

16▼3Tazewell County, ILIL130,049591+6%

17Kendall County, ILIL145,470428−37%

18▲37Marion County, ILIL36,382420+23%

19▲1DeKalb County, ILIL101,835405−25%

20▲8Boone County, ILIL53,568360+30%

21▲4Franklin County, ILIL36,916353+41%

22▼6Macon County, ILIL99,300324−34%

23▲7Henry County, ILIL48,0952970%

24▼5Williamson County, ILIL67,225295−34%

25▼4Coles County, ILIL46,607283+4%

26▼2Adams County, ILIL64,267279+20%

27▼5Vermilion County, ILIL71,259273−56%

28▲5Bureau County, ILIL32,510272+81%

29▲16Ogle County, ILIL51,399250+60%

30▲10Macoupin County, ILIL43,748229−11%

31▲15Whiteside County, ILIL54,121229+101%

32▲4Morgan County, ILIL32,515208+84%

33▼10Jackson County, ILIL52,501196−26%

34▼5Woodford County, ILIL38,111196−14%

35▲6Jefferson County, ILIL36,147187−5%

36▲42Fayette County, ILIL20,790185+106%

37▲34McDonough County, ILIL25,916182−32%

38▲11Warren County, ILIL16,222181+63%

39▼8Saline County, ILIL22,772174−45%

40▼6Stephenson County, ILIL43,2201710%

41▼3Piatt County, ILIL16,791155+74%

42▼24Kankakee County, ILIL105,525152−73%

43▲16Lee County, ILIL32,914152+6%

44▲4Monroe County, ILIL34,840147+32%

45▼6Knox County, ILIL47,767146−59%

46▼2Jo Daviess County, ILIL21,594145−16%

47▼20Montgomery County, ILIL28,076144+62%

48▼1Randolph County, ILIL29,921141+18%

49▲32Carroll County, ILIL15,419137+154%

50Massac County, ILIL13,502135+63%

51▼16Iroquois County, ILIL26,150126−17%

52▲20Crawford County, ILIL18,648111−27%

53▼2Grundy County, ILIL54,052108−78%

54▼12Logan County, ILIL27,182104−44%

55▼3Effingham County, ILIL34,519102+5%

56▼24Fulton County, ILIL32,901102−70%

57▼20Perry County, ILIL20,160100−50%

58▲9Moultrie County, ILIL14,37197+37%

59▼3Douglas County, ILIL19,88094−4%

60▲14Clinton County, ILIL37,12893−4%

61▼11Christian County, ILIL33,44393−18%

62▲24Schuyler County, ILIL6,65793+232%

63▲3Mercer County, ILIL15,22990−27%

64▼7Mason County, ILIL12,41187+335%

65▼2Marshall County, ILIL11,47379−33%

66▼1Hamilton County, ILIL7,85969+2200%

67▲32Pike County, ILIL14,23169−32%

68▲20Johnson County, ILIL13,36367+139%

69▼11Hancock County, ILIL16,80362−42%

70▲28Stark County, ILIL5,31962+7%

71▼1White County, ILIL13,25060−45%

72▲22Greene County, ILIL11,31355−60%

73Henderson County, ILIL5,98454+200%

74▲8De Witt County, ILIL15,11853−50%

75Shelby County, ILIL20,57649−48%

76▼16Livingston County, ILIL35,05744−75%

77▲15Cumberland County, ILIL10,20841−59%

78▼9Union County, ILIL16,65639−70%

79▼25Richland County, ILIL15,21938−5%

80▲5Edwards County, ILIL5,89836−43%

81▼5Jersey County, ILIL21,16036−49%

82▲1Edgar County, ILIL16,32335−40%

83▼15Washington County, ILIL13,56435−87%

84▼41Bond County, ILIL16,95931−78%

85▲12Brown County, ILIL6,40125–

86▼7Ford County, ILIL13,21624−14%

87▼26Lawrence County, ILIL13,79022−55%

88▼11Wayne County, ILIL15,88221−16%

89▲6Pope County, ILIL3,67217−35%

90▼26Clay County, ILIL12,79316−72%

91▼29Menard County, ILIL11,86314−80%

92▼1Putnam County, ILIL5,61914−61%

93▼3Cass County, ILIL12,46313−62%

94▼7Gallatin County, ILIL4,61613−50%

95▼11Wabash County, ILIL10,90713−70%

96Pulaski County, ILIL4,82012+300%

97▼44Clark County, ILIL15,11410−93%

98▲2Scott County, ILIL4,86610−77%

99▼19Jasper County, ILIL9,0329−90%

100▲1Calhoun County, ILIL4,3008+167%

101▼12Alexander County, ILIL4,5708−67%

SHOWING 1–101 OF 101

Download CSV (full list, 101 rows)

UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES