Showing Illinois county sites. All U.S. county sites
C 78
Average overall score of 86 fully scanned Illinois county sites
6th
of 48 states, ranked by average overall score
86 of 96
Sites fully scanned. We couldn't fully scan 10, so they're listed without grades
C 76
U.S. county average overall score, 2435 fully scanned sites
Illinois's state site, illinois.gov, ranks 9th of 51 state sites with a B. State rankings.
How Illinois county overall scores are distributed
Smoothed distribution of the 86 fully scanned Illinois county sites, score 0 to 100. Height shows how many sites score near each value.
Distribution of 86 scores. The data table lists counts by score range.
- Illinois average
- U.S. county average
View the data table
| Score range | Sites |
|---|---|
| 0 to 9 | 0 |
| 10 to 19 | 0 |
| 20 to 29 | 0 |
| 30 to 39 | 0 |
| 40 to 49 | 0 |
| 50 to 59 | 0 |
| 60 to 69 | 8 |
| 70 to 79 | 42 |
| 80 to 89 | 30 |
| 90 to 100 | 6 |
Illinois counties by overall grade
Each county with a site on our list is colored by that site's grade. Select a county to open its report. The table lists every site.
- A (90 to 100)
- B to C (70 to 89)
- D to F (below 70)
- Not fully scanned
- No site on our list
1 of the 96 sites on our list could not be matched to a county boundary and appear only in the table.
Illinois counties by overall grade, compared with all U.S. counties
Share of fully scanned sites in each grade band. Illinois: 86 sites. U.S.: 2435 sites.
- A (90 to 100)
- B to C (70 to 89)
- D to F (below 70)
View the data table
| Group | A (90 to 100) | B to C (70 to 89) | D to F (below 70) |
|---|---|---|---|
| Illinois | 7% (6) | 84% (72) | 9% (8) |
| All U.S. counties | 4% (98) | 82% (2,007) | 14% (330) |
Illinois county average score by indicator, compared with all U.S. counties
Average of the 86 fully scanned Illinois county sites, score 0 to 100. U.S. average covers 2435 fully scanned county sites.
- Illinois
- U.S. counties
View the data table
| Indicator | Illinois average | U.S. counties average |
|---|---|---|
| Accessibility | 87 | 88 |
| Botability | 79 | 76 |
| Security | 90 | 88 |
| Usability | 54 | 49 |
Top 3 Illinois county sites by overall score
#1 in Illinois · U.S. rank 3
Cook County, IL
A 95 overall
- Accessibility A
- Botability A
- Security A
- Usability A
#2 in Illinois · U.S. rank 6
Hamilton County, IL
A 92 overall
- Accessibility A
- Botability A
- Security A
- Usability C
#3 in Illinois · U.S. rank 7
Mason County, IL
A 91 overall
- Accessibility A
- Botability B
- Security B
- Usability B
Most common failures by indicator
The check Illinois county sites fail most often in each indicator. Each indicator page lists the top five.
- 51% (44 of 86 sites) fail this accessibility check: Background and foreground colors have a sufficient contrast ratio. Text and background colors meet minimum contrast ratios. More accessibility failures in Illinois.
- 95% (82 of 86 sites) fail this botability check: GovernmentOrganization Schema.org type. Homepage is marked up as an official government organization. More botability failures in Illinois.
- 40% (34 of 86 sites) fail this security check: Errors in the console. The page loads without JavaScript or network errors. More security failures in Illinois.
- 97% (83 of 86 sites) fail this usability check: Open Graph image alt. The social media preview image has alt text for screen readers. More usability failures in Illinois.
All Illinois county sites by overall score
| Rank | Site | Indicator grades | Grade |
|---|---|---|---|
| 1 |
cookcountyil.gov
Cook County, IL U.S. rank 3 |
|
A |
| 2 |
hamiltoncountyil.gov
Hamilton County, IL U.S. rank 6 |
|
A |
| 3 |
masoncountyil.gov
Mason County, IL U.S. rank 7 |
|
A |
| 4 |
fayettecountyillinois.gov
Fayette County, IL U.S. rank 8 |
|
A |
| 4 |
fultoncountyil.gov
Fulton County, IL U.S. rank 8 |
|
A |
| 4 |
marshallcountyillinois.gov
Marshall County, IL U.S. rank 8 |
|
A |
| 5 |
starkco.illinois.gov
Stark County, IL U.S. rank 9 |
|
B |
| 6 |
greenecountyil.org
Greene County, IL U.S. rank 10 |
|
B |
| 7 |
alexandercounty.illinois.gov
Alexander County, IL U.S. rank 11 |
|
B |
| 7 |
warrencountyil.gov
Warren County, IL U.S. rank 11 |
|
B |
| 7 |
wincoil.gov
Winnebago County, IL U.S. rank 11 |
|
B |
| 8 |
calhouncountyil.gov
Calhoun County, IL U.S. rank 12 |
|
B |
| 8 |
edgarcountyillinois.com
Edgar County, IL U.S. rank 12 |
|
B |
| 8 |
fordcounty.illinois.gov
Ford County, IL U.S. rank 12 |
|
B |
| 8 |
tazewell-il.gov
Tazewell County, IL U.S. rank 12 |
|
B |
| 9 |
browncoil.org
Brown County, IL U.S. rank 13 |
|
B |
| 9 |
gallatinco.illinois.gov
Gallatin County, IL U.S. rank 13 |
|
B |
| 9 |
maconcounty.illinois.gov
Macon County, IL U.S. rank 13 |
|
B |
| 9 |
salinecounty.illinois.gov
Saline County, IL U.S. rank 13 |
|
B |
| 9 |
scottcoil.gov
Scott County, IL U.S. rank 13 |
|
B |
| 9 |
shelbycounty-il.gov
Shelby County, IL U.S. rank 13 |
|
B |
| 10 |
jaspercountyillinois.gov
Jasper County, IL U.S. rank 14 |
|
B |
| 10 |
macoupincountyil.gov
Macoupin County, IL U.S. rank 14 |
|
B |
| 10 |
marioncountyil.gov
Marion County, IL U.S. rank 14 |
|
B |
| 10 |
moultriecountyil.gov
Moultrie County, IL U.S. rank 14 |
|
B |
| 11 |
dewittcountyil.gov
DeWitt County, IL U.S. rank 15 |
|
B |
| 11 |
effinghamcountyil.gov
Effingham County, IL U.S. rank 15 |
|
B |
| 11 |
schuylercounty.org
Schuyler County, IL U.S. rank 15 |
|
B |
| 12 |
grundycountyil.gov
Grundy County, IL U.S. rank 16 |
|
B |
| 12 |
pulaskicountyil.net
Pulaski County, IL U.S. rank 16 |
|
B |
| 12 |
randolphcountyil.gov
Randolph County, IL U.S. rank 16 |
|
B |
| 13 |
crawfordcountyil.org
Crawford County, IL U.S. rank 17 |
|
B |
| 13 |
whitecounty-il.gov
White County, IL U.S. rank 17 |
|
B |
| 14 |
iroquoiscountyil.gov
Iroquois County, IL U.S. rank 18 |
|
B |
| 14 |
jerseycounty-il.gov
Jersey County, IL U.S. rank 18 |
|
B |
| 14 |
mercercountyil.org
Mercer County, IL U.S. rank 18 |
|
B |
| 15 |
piatt.gov
Piatt County, IL U.S. rank 19 |
|
C |
| 15 |
vercounty.org
Vermilion County, IL U.S. rank 19 |
|
C |
| 16 |
knoxcountyil.gov
Knox County, IL U.S. rank 20 |
|
C |
| 16 |
waynecountyil.gov
Wayne County, IL U.S. rank 20 |
|
C |
| 17 |
monroecountyil.gov
Monroe County, IL U.S. rank 21 |
|
C |
| 17 |
putnamil.gov
Putnam County, IL U.S. rank 21 |
|
C |
| 17 |
richlandcounty.illinois.gov
Richland County, IL U.S. rank 21 |
|
C |
| 18 |
bureaucounty-il.gov
Bureau County, IL U.S. rank 22 |
|
C |
| 18 |
dupagecounty.gov
DuPage County, IL U.S. rank 22 |
|
C |
| 18 |
jeffersoncounty.illinois.gov
Jefferson County, IL U.S. rank 22 |
|
C |
| 18 |
massaccountyil.gov
Massac County, IL U.S. rank 22 |
|
C |
| 18 |
mcleancountyil.gov
McLean County, IL U.S. rank 22 |
|
C |
| 18 |
oglecountyil.gov
Ogle County, IL U.S. rank 22 |
|
C |
| 19 |
colesco.illinois.gov
Coles County, IL U.S. rank 23 |
|
C |
| 19 |
jodaviesscountyil.gov
Jo Daviess County, IL U.S. rank 23 |
|
C |
| 19 |
lakecountyil.gov
Lake County, IL U.S. rank 23 |
|
C |
| 19 |
livingstoncountyil.gov
Livingston County, IL U.S. rank 23 |
|
C |
| 19 |
morgancounty-il.com
Morgan County, IL U.S. rank 23 |
|
C |
| 19 |
rockislandcountyil.gov
Rock Island County, IL U.S. rank 23 |
|
C |
| 19 |
stephensoncountyil.gov
Stephenson County, IL U.S. rank 23 |
|
C |
| 19 |
willcounty.gov
Will County, IL U.S. rank 23 |
|
C |
| 20 |
carrollcountyil.gov
Carroll County, IL U.S. rank 24 |
|
C |
| 20 |
jacksoncounty-il.gov
Jackson County, IL U.S. rank 24 |
|
C |
| 20 |
kanecountyil.gov
Kane County, IL U.S. rank 24 |
|
C |
| 20 |
lawrencecounty.illinois.gov
Lawrence County, IL U.S. rank 24 |
|
C |
| 20 |
madisoncountyil.gov
Madison County, IL U.S. rank 24 |
|
C |
| 20 |
peoriacounty.gov
Peoria County, IL U.S. rank 24 |
|
C |
| 20 |
sangamonil.gov
Sangamon County, IL U.S. rank 24 |
|
C |
| 21 |
bondcountyil.gov
Bond County, IL U.S. rank 25 |
|
C |
| 21 |
boonecountyil.gov
Boone County, IL U.S. rank 25 |
|
C |
| 21 |
co.cass.il.us
Cass County, IL U.S. rank 25 |
|
C |
| 21 |
champaigncountyil.gov
Champaign County, IL U.S. rank 25 |
|
C |
| 21 |
cumberlandcoil.gov
Cumberland County, IL U.S. rank 25 |
|
C |
| 21 |
douglascountyil.gov
Douglas County, IL U.S. rank 25 |
|
C |
| 21 |
leecountyil.com
Lee County, IL U.S. rank 25 |
|
C |
| 22 |
lasallecountyil.gov
LaSalle County, IL U.S. rank 26 |
|
C |
| 22 |
whitesidecountyil.gov
Whiteside County, IL U.S. rank 26 |
|
C |
| 23 |
franklincountyil.gov
Franklin County, IL U.S. rank 27 |
|
C |
| 23 |
henrycty.com
Henry County, IL U.S. rank 27 |
|
C |
| 23 |
montgomerycountyil.gov
Montgomery County, IL U.S. rank 27 |
|
C |
| 23 |
woodford-county.org
Woodford County, IL U.S. rank 27 |
|
C |
| 24 |
co.st-clair.il.us
Saint Clair County, IL U.S. rank 28 |
|
C |
| 25 |
pikecountyil.org
Pike County, IL U.S. rank 29 |
|
D |
| 25 |
washingtonco.illinois.gov
Washington County, IL U.S. rank 29 |
|
D |
| 26 |
k3county.net
Kankakee County, IL U.S. rank 30 |
|
D |
| 27 |
clarkcountyil.org
Clark County, IL U.S. rank 31 |
|
D |
| 28 |
clintonco.illinois.gov
Clinton County, IL U.S. rank 32 |
|
D |
| 29 |
mcg.mcdonough.il.us
McDonough County, IL U.S. rank 33 |
|
D |
| 30 |
logancountyil.gov
Logan County, IL U.S. rank 34 |
|
D |
| 31 |
menardcountyil.gov
Menard County, IL U.S. rank 36 |
|
D |
|
adamscountyil.gov
Adams County, IL |
Not fully scanned, so not graded. We couldn't fully scan your site because it responded without any page content. Status 995 | - | |
|
christiancountyil.gov
Christian County, IL |
Not fully scanned, so not graded. We couldn't scan your site because it showed our bot a captcha or browser check instead of the page. Status 996 | - | |
|
claycountyillinois.org
Clay County, IL |
Not fully scanned, so not graded. We weren't able to fully scan your site. Status 403 | - | |
|
dekalbcounty.org
DeKalb County, IL |
Not fully scanned, so not graded. We couldn't scan your site because it showed our bot a captcha or browser check instead of the page. Status 996 | - | |
|
hancockcounty-il.gov
Hancock County, IL |
Not fully scanned, so not graded. We couldn't fully scan your site because it responded without any page content. Status 995 | - | |
|
kendallcountyil.gov
Kendall County, IL |
Not fully scanned, so not graded. We couldn't fully scan your site because it responded without any page content. Status 995 | - | |
|
mchenrycountyil.gov
McHenry County, IL |
Not fully scanned, so not graded. We couldn't fully scan your site because it responded without any page content. Status 995 | - | |
|
perrycountyil.gov
Perry County, IL |
Not fully scanned, so not graded. We couldn't scan your site because it showed our bot a captcha or browser check instead of the page. Status 996 | - | |
|
unioncountyil.gov
Union County, IL |
Not fully scanned, so not graded. We couldn't scan your site because it showed our bot a captcha or browser check instead of the page. Status 996 | - | |
|
williamsoncountyil.gov
Williamson County, IL |
Not fully scanned, so not graded. We couldn't scan your site because it showed our bot a captcha or browser check instead of the page. Status 996 | - |
About this data
ScanGov scans the homepage of each county government site on our county list in Illinois. Scores come from the checks listed on standards.scangov.org. Sites were scanned between 8/24/2026 and 9/18/2026; each site's report shows its own scan date. A site counts as fully scanned when its homepage returned successfully and sent the scanner its page content. Averages, grade shares, failure rates, and ranks use fully scanned sites only. We weren't able to fully scan 10 sites because they did not respond, blocked the scanner, or returned no page content. They appear in the table without grades, each with its scan status, and are left out of every figure. Grades follow the ScanGov grade scale, and rank follows the ScanGov ranking method. The full dataset, including every county's raw results, is published in the ScanGov data repository.