Missouri county websites: security rankings

Name: Project ScanGov Missouri county websites: security rankings
Creator: ScanGov
License: https://creativecommons.org/licenses/by/4.0/

Security scores, grades, and the most common failures for 96 Missouri county government websites, from ScanGov homepage scans.

Sites: 96
Last scan: 9/20/2026

Showing Missouri county sites. All U.S. county sites

B 86

Average security score of 90 fully scanned Missouri county sites

11th

of 48 states, ranked by average security score

90 of 96

Sites fully scanned. We couldn't fully scan 6, so they're listed without grades

B 88

U.S. county average security score, 2435 fully scanned sites

Missouri's state site, mo.gov, ranks 18th of 51 state sites with a C. State rankings.

How Missouri county security scores are distributed

Smoothed distribution of the 90 fully scanned Missouri county sites, score 0 to 100. Height shows how many sites score near each value.

Missouri average
U.S. county average

View the data table

How Missouri county security scores are distributed
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	2
70 to 79	21
80 to 89	45
90 to 100	22

Missouri counties by security grade, compared with all U.S. counties

Share of fully scanned sites in each grade band. Missouri: 90 sites. U.S.: 2435 sites.

MissouriA (90 to 100): 24% (22 sites)B to C (70 to 89): 73% (66 sites)D to F (below 70): 2% (2 sites)
All U.S. countiesA (90 to 100): 34% (823 sites)B to C (70 to 89): 65% (1,574 sites)D to F (below 70): 2% (38 sites)

A (90 to 100)
B to C (70 to 89)
D to F (below 70)

View the data table

Missouri counties by security grade, compared with all U.S. counties
Group	A (90 to 100)	B to C (70 to 89)	D to F (below 70)
Missouri	24% (22)	73% (66)	2% (2)
All U.S. counties	34% (823)	65% (1,574)	2% (38)

Top 3 Missouri county sites by security score

#1 in Missouri · U.S. rank 1

Boone County, MO

A 100 security

Accessibility A
Botability A
Security A
Usability C

#1 in Missouri · U.S. rank 1

Camden County, MO

A 100 security

Accessibility B
Botability D
Security A
Usability F

#1 in Missouri · U.S. rank 1

Carroll County, MO

A 100 security

Accessibility B
Botability A
Security A
Usability F

Most common security failures among Missouri county sites

Share of the 90 fully scanned Missouri county sites failing each check. A site can fail more than one check. Each check links to its standard and how to fix it.

Sponsored top-level domain (sTLD)59% (53 of 90 sites)
Errors in the console39% (35 of 90 sites)
Hypertext Transfer Protocol Secure (HTTPS)2% (2 of 90 sites)
X-Content-Type-Options2% (2 of 90 sites)
Security.txt1% (1 of 90 sites)

View the data table

Most common security failures among Missouri county sites
Check	Share failing	Sites failing
Sponsored top-level domain (sTLD)	59%	53
Errors in the console	39%	35
Hypertext Transfer Protocol Secure (HTTPS)	2%	2
X-Content-Type-Options	2%	2
Security.txt	1%	1

What each check means

Sponsored top-level domain (sTLD). The site uses a government-issued domain (.gov, .edu, or .mil). People cannot tell if your site is real government.
Errors in the console. The page loads without JavaScript or network errors. Site may have hidden bugs that break features.
Hypertext Transfer Protocol Secure (HTTPS). The site uses HTTPS to encrypt data between the server and users. Hackers can see and steal personal information.
X-Content-Type-Options. The site tells browsers not to guess the type of files it serves. Browsers might run dangerous files by mistake.
Security.txt. The site has a security.txt file so researchers know how to report issues. Security researchers cannot report problems to you.

All Missouri county sites by security score

Missouri county sites ranked by security score
Rank	Site	Checks passed	Grade
1	boonemo.gov Boone County, MO U.S. rank 1	8 of 8 checks pass	A
1	camdencountymo.gov Camden County, MO U.S. rank 1	8 of 8 checks pass	A
1	carrollcountymo.gov Carroll County, MO U.S. rank 1	7 of 7 checks pass	A
1	christiancountymo.gov Christian County, MO U.S. rank 1	7 of 7 checks pass	A
1	stlouis-mo.gov City of St. Louis, MO U.S. rank 1	8 of 8 checks pass	A
1	claycountymo.gov Clay County, MO U.S. rank 1	8 of 8 checks pass	A
1	coopercountymo.gov Cooper County, MO U.S. rank 1	7 of 7 checks pass	A
1	dunklincounty.gov Dunklin County, MO U.S. rank 1	7 of 7 checks pass	A
1	holtcountymo.gov Holt County, MO U.S. rank 1	7 of 7 checks pass	A
1	howellcountymo.gov Howell County, MO U.S. rank 1	7 of 7 checks pass	A
1	ironcountymo.gov Iron County, MO U.S. rank 1	8 of 8 checks pass	A
1	jaspercountymo.gov Jasper County, MO U.S. rank 1	8 of 8 checks pass	A
1	jocomo.gov Johnson County, MO U.S. rank 1	8 of 8 checks pass	A
1	lincolncomo.gov Lincoln County, MO U.S. rank 1	8 of 8 checks pass	A
1	marioncounty-mo.gov Marion County, MO U.S. rank 1	7 of 7 checks pass	A
1	morgancountymo.gov Morgan County, MO U.S. rank 1	7 of 7 checks pass	A
1	rallscountymo.gov Ralls County, MO U.S. rank 1	7 of 7 checks pass	A
1	salinecountymo.gov Saline County, MO U.S. rank 1	8 of 8 checks pass	A
1	shannoncounty.gov Shannon County, MO U.S. rank 1	7 of 7 checks pass	A
1	stegencounty.gov Ste. Genevieve County, MO U.S. rank 1	7 of 7 checks pass	A
1	texascountymissouri.gov Texas County, MO U.S. rank 1	8 of 8 checks pass	A
1	wrightcountymo.gov Wright County, MO U.S. rank 1	8 of 8 checks pass	A
2	casscounty.com Cass County, MO U.S. rank 3	7 of 8 checks pass	B
2	clarkcountymo.org Clark County, MO U.S. rank 3	7 of 8 checks pass	B
2	colecounty.org Cole County, MO U.S. rank 3	7 of 8 checks pass	B
2	crawfordcountymo.net Crawford County, MO U.S. rank 3	7 of 8 checks pass	B
2	franklinmo.org Franklin County, MO U.S. rank 3	7 of 8 checks pass	B
2	henrycomo.com Henry County, MO U.S. rank 3	7 of 8 checks pass	B
2	jeffcomo.gov Jefferson County, MO U.S. rank 3	7 of 8 checks pass	B
2	madisoncountymo.us Madison County, MO U.S. rank 3	7 of 8 checks pass	B
2	mcdonaldcountymo.gov McDonald County, MO U.S. rank 3	7 of 8 checks pass	B
2	perrycountymo.us Perry County, MO U.S. rank 3	7 of 8 checks pass	B
2	co.platte.mo.us Platte County, MO U.S. rank 3	7 of 8 checks pass	B
2	sccmo.org Saint Charles County, MO U.S. rank 3	7 of 8 checks pass	B
2	webstercountymo.gov Webster County, MO U.S. rank 3	7 of 8 checks pass	B
3	barrycountycollector.com Barry County, MO U.S. rank 4	6 of 7 checks pass	B
3	countyofbarton.gov Barton County, MO U.S. rank 4	6 of 7 checks pass	B
3	batescounty.net Bates County, MO U.S. rank 4	6 of 7 checks pass	B
3	butlercountymo.com Butler County, MO U.S. rank 4	6 of 7 checks pass	B
3	callawaycounty.org Callaway County, MO U.S. rank 4	6 of 7 checks pass	B
3	cedarcountymo.gov Cedar County, MO U.S. rank 4	6 of 7 checks pass	B
3	charitonco.com Chariton County, MO U.S. rank 4	6 of 7 checks pass	B
3	dadecountymo.gov Dade County, MO U.S. rank 4	6 of 7 checks pass	B
3	daviesscountymo.gov Daviess County, MO U.S. rank 4	6 of 7 checks pass	B
3	dekalbcountymo.com DeKalb County, MO U.S. rank 4	6 of 7 checks pass	B
3	greenecountymo.gov Greene County, MO U.S. rank 4	6 of 7 checks pass	B
3	lacledecountymissouri.org Laclede County, MO U.S. rank 4	6 of 7 checks pass	B
3	lafayettecountymo.gov Lafayette County, MO U.S. rank 4	6 of 7 checks pass	B
3	linncomo.com Linn County, MO U.S. rank 4	6 of 7 checks pass	B
3	livingstoncountymo.gov Livingston County, MO U.S. rank 4	6 of 7 checks pass	B
3	maconcountymo.com Macon County, MO U.S. rank 4	6 of 7 checks pass	B
3	mariescountymo.gov Maries County, MO U.S. rank 4	6 of 7 checks pass	B
3	millercountymo.gov Miller County, MO U.S. rank 4	6 of 7 checks pass	B
3	monroecountymo.gov Monroe County, MO U.S. rank 4	6 of 7 checks pass	B
3	newtoncountymo.com Newton County, MO U.S. rank 4	6 of 7 checks pass	B
3	nodawaycountymo.us Nodaway County, MO U.S. rank 4	6 of 7 checks pass	B
3	pemiscotcounty.org Pemiscot County, MO U.S. rank 4	6 of 7 checks pass	B
3	pettiscomo.gov Pettis County, MO U.S. rank 4	6 of 7 checks pass	B
3	polkcountymo.gov Polk County, MO U.S. rank 4	6 of 7 checks pass	B
3	randolphcounty-mo.com Randolph County, MO U.S. rank 4	6 of 7 checks pass	B
3	raycountymo.com Ray County, MO U.S. rank 4	6 of 7 checks pass	B
3	ripleycountymissouri.org Ripley County, MO U.S. rank 4	6 of 7 checks pass	B
3	sfcgov.org Saint Francois County, MO U.S. rank 4	6 of 7 checks pass	B
3	scottcountymo.com Scott County, MO U.S. rank 4	6 of 7 checks pass	B
3	taneycounty.org Taney County, MO U.S. rank 4	6 of 7 checks pass	B
3	warrencountymo.org Warren County, MO U.S. rank 4	6 of 7 checks pass	B
3	washingtoncountymo.us Washington County, MO U.S. rank 4	6 of 7 checks pass	B
4	adaircountymissouri.com Adair County, MO U.S. rank 7	6 of 8 checks pass	C
4	andrewcounty.org Andrew County, MO U.S. rank 7	6 of 8 checks pass	C
4	cartercountymosheriff.org Carter County, MO U.S. rank 7	6 of 8 checks pass	C
4	jacksongov.org Jackson County, MO U.S. rank 7	6 of 8 checks pass	C
4	lawrencecountymo.org Lawrence County, MO U.S. rank 7	6 of 8 checks pass	C
4	scotlandcountymo.org Scotland County, MO U.S. rank 7	6 of 8 checks pass	C
4	shelbycountymo.com Shelby County, MO U.S. rank 7	6 of 8 checks pass	C
4	stclaircomo.com St. Clair County, MO U.S. rank 7	6 of 8 checks pass	C
4	stoneco-mo.us Stone County, MO U.S. rank 7	6 of 8 checks pass	C
4	vernoncountymo.org Vernon County, MO U.S. rank 7	6 of 8 checks pass	C
5	bentoncomo.com Benton County, MO U.S. rank 8	5 of 7 checks pass	C
5	clintoncomo.org Clinton County, MO U.S. rank 8	5 of 7 checks pass	C
5	gentrycounty.net Gentry County, MO U.S. rank 8	5 of 7 checks pass	C
5	grundycountymo.com Grundy County, MO U.S. rank 8	5 of 7 checks pass	C
5	knoxcountymo.org Knox County, MO U.S. rank 8	5 of 7 checks pass	C
5	lewiscountymo.org Lewis County, MO U.S. rank 8	5 of 7 checks pass	C
5	misscomo.net Mississippi County, MO U.S. rank 8	5 of 7 checks pass	C
5	osagecountygov.com Osage County, MO U.S. rank 8	5 of 7 checks pass	C
5	ozarkcounty.net Ozark County, MO U.S. rank 8	5 of 7 checks pass	C
5	pikecountymo.net Pike County, MO U.S. rank 8	5 of 7 checks pass	C
5	pulaskicountymo.org Pulaski County, MO U.S. rank 8	5 of 7 checks pass	C
6	audraincounty.org Audrain County, MO U.S. rank 10	5 of 8 checks pass	D
6	new-madrid.mo.us New Madrid County, MO U.S. rank 10	5 of 8 checks pass	D
	co.buchanan.mo.us Buchanan County, MO	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	-
	capecounty.us Cape Girardeau County, MO	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	-
	gasconadecounty.org Gasconade County, MO	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	-
	hickorycomo.net Hickory County, MO	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	-
	phelpscounty.org Phelps County, MO	Not fully scanned, so not graded. We didn't scan your site because its robots.txt asks crawlers to wait longer than we can. Status 997	-
	stlouiscountymo.gov St. Louis County, MO	Not fully scanned, so not graded. We couldn't fully scan your site because it responded without any page content. Status 995	-

Rank · Status · Grade

About security

Secure your site and protect users with proper security practices.

Why it's important

Strong defenses prevent hackers from stealing personal information and other confidential data.

Risks

Hackers can steal private information from your site.

Guidance

What we use to grade security:

Standards

Grades/scores

Security grades/scores on Project ScanGov

ScanGov

How ScanGov supports security

About this data

ScanGov scans the homepage of each county government site on our county list in Missouri. Scores come from the checks listed on standards.scangov.org. Sites were scanned between 7/19/2026 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 6 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.