Data / Rankings / High school graduate or higher, population 25 and over / Counties in Illinois

Counties in Illinois by high school graduate or higher, population 25 and over

McLean County had the highest high school graduate or higher, population 25 and over of 102 counties in 2022, at 95.9%. Brown County had the lowest, at 80.3%. The median was 91.1% and the figure for Illinois was 90.1%. Source: the U.S. Census Bureau.

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Highest95.9McLean County
Lowest80.3Brown County
Median91.1102 counties
Illinois90.1History

Map of counties, 2022

Adams County: 93.4 %Alexander County: 86.4 %Bond County: 88.9 %Boone County: 86.6 %Brown County: 80.3 %Bureau County: 90.3 %Calhoun County: 92 %Carroll County: 88.4 %Cass County: 86.2 %Champaign County: 94.7 %Christian County: 90.4 %Clark County: 92.2 %Clay County: 88.1 %Clinton County: 92 %Coles County: 92 %Cook County: 88.2 %Crawford County: 88.7 %Cumberland County: 93.4 %DeKalb County: 93 %De Witt County: 94.2 %Douglas County: 84.8 %DuPage County: 93.5 %Edgar County: 87.9 %Edwards County: 91.1 %Effingham County: 93.5 %Fayette County: 86.6 %Ford County: 91.7 %Franklin County: 89.9 %Fulton County: 89.9 %Gallatin County: 87.2 %Greene County: 90.4 %Grundy County: 94 %Hamilton County: 86.3 %Hancock County: 94.4 %Hardin County: 87.3 %Henderson County: 93 %Henry County: 92.5 %Iroquois County: 88.7 %Jackson County: 91.8 %Jasper County: 93.3 %Jefferson County: 90.6 %Jersey County: 93.4 %Jo Daviess County: 93.5 %Johnson County: 84.6 %Kane County: 86.5 %Kankakee County: 89.9 %Kendall County: 93.4 %Knox County: 88.8 %Lake County: 90.8 %LaSalle County: 91.1 %Lawrence County: 85.2 %Lee County: 90 %Livingston County: 90.5 %Logan County: 91.5 %McDonough County: 94.4 %McHenry County: 93.9 %McLean County: 95.9 %Macon County: 92.4 %Macoupin County: 91 %Madison County: 93.3 %Marion County: 90 %Marshall County: 92 %Mason County: 91.3 %Massac County: 87.7 %Menard County: 95 %Mercer County: 92.4 %Monroe County: 95.7 %Montgomery County: 89.7 %Morgan County: 89.6 %Moultrie County: 86.4 %Ogle County: 91.3 %Peoria County: 92.9 %Perry County: 84.5 %Piatt County: 93.9 %Pike County: 91 %Pope County: 88.2 %Pulaski County: 88.1 %Putnam County: 93.6 %Randolph County: 86 %Richland County: 92.1 %Rock Island County: 89.6 %St. Clair County: 92.2 %Saline County: 88.2 %Sangamon County: 93.2 %Schuyler County: 91.7 %Scott County: 92.8 %Shelby County: 93.9 %Stark County: 90.9 %Stephenson County: 91.8 %Tazewell County: 93.7 %Union County: 88 %Vermilion County: 90.6 %Wabash County: 93 %Warren County: 87.5 %Washington County: 92.5 %Wayne County: 89.3 %White County: 88.5 %Whiteside County: 90.8 %Will County: 91.6 %Williamson County: 92.7 %Winnebago County: 88.5 %Woodford County: 94.2 %
  • Under 88
  • 88 to 90
  • 90 to 91
  • 91 to 92
  • 92 to 93
  • 93 and over
%, 2022. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2022

McLean County: 95.9 %McLean County95.9Monroe County: 95.7 %Monroe County95.7Menard County: 95 %Menard County95Champaign County: 94.7 %Champaign County94.7Hancock County: 94.4 %Hancock County94.4McDonough County: 94.4 %McDonough County94.4Woodford County: 94.2 %Woodford County94.2De Witt County: 94.2 %De Witt County94.2Grundy County: 94 %Grundy County94McHenry County: 93.9 %McHenry County93.9Shelby County: 93.9 %Shelby County93.9Piatt County: 93.9 %Piatt County93.9Tazewell County: 93.7 %Tazewell County93.7Putnam County: 93.6 %Putnam County93.6Jo Daviess County: 93.5 %Jo Daviess County93.5Effingham County: 93.5 %Effingham County93.5DuPage County: 93.5 %DuPage County93.5Cumberland County: 93.4 %Cumberland County93.4Kendall County: 93.4 %Kendall County93.4Adams County: 93.4 %Adams County93.4Jersey County: 93.4 %Jersey County93.4Madison County: 93.3 %Madison County93.3Jasper County: 93.3 %Jasper County93.3Sangamon County: 93.2 %Sangamon County93.2DeKalb County: 93 %DeKalb County93Wabash County: 93 %Wabash County93Henderson County: 93 %Henderson County93Peoria County: 92.9 %Peoria County92.9Scott County: 92.8 %Scott County92.8Williamson County: 92.7 %Williamson County92.7Washington County: 92.5 %Washington County92.5Henry County: 92.5 %Henry County92.5Mercer County: 92.4 %Mercer County92.4Macon County: 92.4 %Macon County92.4St. Clair County: 92.2 %St. Clair County92.2Clark County: 92.2 %Clark County92.2Richland County: 92.1 %Richland County92.1Calhoun County: 92 %Calhoun County92Marshall County: 92 %Marshall County92Clinton County: 92 %Clinton County92McLean County: 95.9 %McLean County95.9Monroe County: 95.7 %Monroe County95.7Menard County: 95 %Menard County95Champaign County: 94.7 %Champaign County94.7Hancock County: 94.4 %Hancock County94.4McDonough County: 94.4 %McDonough County94.4Woodford County: 94.2 %Woodford County94.2De Witt County: 94.2 %De Witt County94.2Grundy County: 94 %Grundy County94McHenry County: 93.9 %McHenry County93.9Shelby County: 93.9 %Shelby County93.9Piatt County: 93.9 %Piatt County93.9Tazewell County: 93.7 %Tazewell County93.7Putnam County: 93.6 %Putnam County93.6Jo Daviess County: 93.5 %Jo Daviess County93.5Effingham County: 93.5 %Effingham County93.5DuPage County: 93.5 %DuPage County93.5Cumberland County: 93.4 %Cumberland County93.4Kendall County: 93.4 %Kendall County93.4Adams County: 93.4 %Adams County93.4Jersey County: 93.4 %Jersey County93.4Madison County: 93.3 %Madison County93.3Jasper County: 93.3 %Jasper County93.3Sangamon County: 93.2 %Sangamon County93.2DeKalb County: 93 %DeKalb County93Wabash County: 93 %Wabash County93Henderson County: 93 %Henderson County93Peoria County: 92.9 %Peoria County92.9Scott County: 92.8 %Scott County92.8Williamson County: 92.7 %Williamson County92.7Washington County: 92.5 %Washington County92.5Henry County: 92.5 %Henry County92.5Mercer County: 92.4 %Mercer County92.4Macon County: 92.4 %Macon County92.4St. Clair County: 92.2 %St. Clair County92.2Clark County: 92.2 %Clark County92.2Richland County: 92.1 %Richland County92.1Calhoun County: 92 %Calhoun County92Marshall County: 92 %Marshall County92Clinton County: 92 %Clinton County92
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2022 (%)Change on 2021
1McLean County95.9-0.1 pts
2Monroe County95.7+0.4 pts
3Menard County95-0.7 pts
4Champaign County94.7-0.1 pts
5Hancock County94.4+1 pts
6McDonough County94.4-0.6 pts
7Woodford County94.2-0.1 pts
8De Witt County94.2+1 pts
9Grundy County94+0.4 pts
10McHenry County93.9+0.3 pts
11Shelby County93.9+0.7 pts
12Piatt County93.9+0.1 pts
13Tazewell County93.7+0.5 pts
14Putnam County93.6+0.3 pts
15Jo Daviess County93.5+1.3 pts
16Effingham County93.5+0.4 pts
17DuPage County93.50 pts
18Cumberland County93.4+0.5 pts
19Kendall County93.4-0.2 pts
20Adams County93.4+0.9 pts
20Jersey County93.4+0.9 pts
22Madison County93.3+0.3 pts
23Jasper County93.3+1.3 pts
24Sangamon County93.2+0.4 pts
25DeKalb County93+0.4 pts
25Wabash County93+1.2 pts
27Henderson County93+0.5 pts
28Peoria County92.9+0.7 pts
29Scott County92.8-1.3 pts
30Williamson County92.70 pts
31Washington County92.5+0.4 pts
32Henry County92.5+0.2 pts
33Mercer County92.4-0.1 pts
34Macon County92.4+0.6 pts
35St. Clair County92.2-0 pts
36Clark County92.2-0.8 pts
37Richland County92.1-0.3 pts
38Calhoun County92-0.7 pts
38Marshall County92-0.4 pts
40Clinton County92+0.7 pts
41Coles County920 pts
42Jackson County91.8+0.2 pts
43Stephenson County91.8-0.1 pts
44Ford County91.7-0 pts
45Schuyler County91.7-0.7 pts
46Will County91.6+0.1 pts
47Logan County91.5+1.2 pts
48Mason County91.3+0.7 pts
49Ogle County91.3+0.3 pts
50Edwards County91.1-1.1 pts
50LaSalle County91.1+0.5 pts
52Pike County91-0.1 pts
53Macoupin County91-0.1 pts
54Stark County90.9+1.4 pts
55Lake County90.8-0 pts
56Whiteside County90.8-0.6 pts
57Jefferson County90.6+0.7 pts
58Vermilion County90.6+0.3 pts
59Livingston County90.5+0.4 pts
60Christian County90.4+1 pts
61Greene County90.4-0.3 pts
62Bureau County90.3-0.3 pts
63Lee County90+0.4 pts
64Marion County90+1 pts
65Franklin County89.9+0.4 pts
66Fulton County89.9+0.4 pts
66Kankakee County89.9+0.4 pts
68Montgomery County89.7+1.9 pts
69Morgan County89.6+0.2 pts
70Rock Island County89.6+0.6 pts
71Wayne County89.3+1.9 pts
72Bond County88.9+0.2 pts
73Knox County88.8-0.2 pts
74Iroquois County88.7+0.3 pts
75Crawford County88.7+2.3 pts
76Winnebago County88.5+0.4 pts
77White County88.5-1.2 pts
78Carroll County88.4+0.5 pts
79Cook County88.2+0.2 pts
80Pope County88.2-0.9 pts
80Saline County88.2+0.3 pts
82Clay County88.1-0.3 pts
83Pulaski County88.1-1.2 pts
84Union County88-1.2 pts
85Edgar County87.9-0.1 pts
86Massac County87.7+0.3 pts
87Warren County87.5-0.4 pts
88Hardin County87.3+2.5 pts
89Gallatin County87.2-0.8 pts
90Boone County86.6-0.5 pts
91Fayette County86.6+0.2 pts
92Kane County86.5+0.5 pts
93Moultrie County86.4-0.2 pts
94Alexander County86.4+0.2 pts
95Hamilton County86.3-1.8 pts
96Cass County86.2+1.2 pts
97Randolph County86+1 pts
98Lawrence County85.2+0.8 pts
99Douglas County84.8+0.9 pts
100Johnson County84.6+1.6 pts
101Perry County84.5+0.9 pts
102Brown County80.3-0.4 pts

Other periods

About this ranking

People aged 25 and over who hold a regular high school diploma, a GED or alternative credential, or any higher level of education, as a percentage of all people aged 25 and over. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

Measures the adult population, not students: it is not the high school graduation rate of a class. Not comparable with the EU share below upper secondary education, which covers ages 25 to 64.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b15003.dat. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs (Counties in Illinois by high school graduate or higher, population 25 and over, 2022) [Data set]. Retrieved October 12, 2026, from https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b15003.dat

MLA 9

American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs, Counties in Illinois by high school graduate or higher, population 25 and over, 2022. U.S. Census Bureau, 29 Jan. 2026, https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b15003.dat. Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/illinois-counties?period=2022. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs. Counties in Illinois by high school graduate or higher, population 25 and over, 2022. Dataset. Accessed October 12, 2026. https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b15003.dat. Also distributed by Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/illinois-counties?period=2022.

Harvard

U.S. Census Bureau (2026) American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs, Counties in Illinois by high school graduate or higher, population 25 and over, 2022 [Dataset]. Available at: https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b15003.dat, via Invokely: https://invokely.ai/rankings/high-school-graduate-or-higher/illinois-counties?period=2022 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_illinois_by_2022,
  author = {{U.S. Census Bureau}},
  title = {{American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs: Counties in Illinois by high school graduate or higher, population 25 and over, 2022}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b15003.dat},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/illinois-counties?period=2022. Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary\_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b15003.dat. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs: Counties in Illinois by high school graduate or higher, population 25 and over, 2022
PY  - 2026
DA  - 2026/01/29
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b15003.dat
L2  - https://invokely.ai/rankings/high-school-graduate-or-higher/illinois-counties?period=2022
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/high-school-graduate-or-higher/illinois-counties?period=2022.
N1  - Publisher attribution: U.S. Census Bureau. American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs. https://www2.census.gov/programs-surveys/acs/summary_file/2022/table-based-SF/data/5YRData/acsdt5y2022-b15003.dat. Retrieved 2026-10-12.
ER  -
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Rank Counties in Illinois by high school graduate or higher, population 25 and over using official data, and cite the source.
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Questions

Which county has the highest high school graduate or higher, population 25 and over?

McLean County, with 95.9% in 2022, according to the U.S. Census Bureau.

Which county has the lowest high school graduate or higher, population 25 and over?

Brown County, with 80.3% in 2022.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B15003: population 25 years and over with a high school diploma, GED or higher as a percentage of the population 25 years and over, calculated with stored inputs. Retrieved 2026-10-12.

High school graduate or higher, population 25 and over: other rankings

Counties in Illinois: more rankings