Showing California county sites. All U.S. county sites
B 88
Average security score of 40 fully scanned California county sites
9th
of 48 states, ranked by average security score
40 of 53
Sites fully scanned. We couldn't fully scan 13, so they're listed without grades
B 88
U.S. county average security score, 2435 fully scanned sites
California's state site, ca.gov, ranks 1st of 51 state sites with an A. State rankings.
How California county security scores are distributed
Smoothed distribution of the 40 fully scanned California county sites, score 0 to 100. Height shows how many sites score near each value.
Distribution of 40 scores. The data table lists counts by score range.
- California 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 | 1 |
| 70 to 79 | 7 |
| 80 to 89 | 20 |
| 90 to 100 | 12 |
California counties by security 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 53 sites on our list could not be matched to a county boundary and appear only in the table.
California counties by security grade, compared with all U.S. counties
Share of fully scanned sites in each grade band. California: 40 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) |
|---|---|---|---|
| California | 30% (12) | 68% (27) | 3% (1) |
| All U.S. counties | 34% (823) | 65% (1,574) | 2% (38) |
Top 3 California county sites by security score
#1 in California · U.S. rank 1
Alpine County, CA
A 100 security
- Accessibility B
- Botability D
- Security A
- Usability F
#1 in California · U.S. rank 1
County of Solano, CA
A 100 security
- Accessibility A
- Botability B
- Security A
- Usability F
#1 in California · U.S. rank 1
Fresno County, CA
A 100 security
- Accessibility A
- Botability A
- Security A
- Usability F
What each check means
- Errors in the console. The page loads without JavaScript or network errors. Site may have hidden bugs that break features.
- 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.
- Security.txt. The site has a security.txt file so researchers know how to report issues. Security researchers cannot report problems to you.
All California county sites by security score
| Rank | Site | Checks passed | Grade |
|---|---|---|---|
| 1 |
alpinecountyca.gov
Alpine County, CA U.S. rank 1 |
8 of 8 checks pass | A |
| 1 |
solanocounty.gov
County of Solano, CA U.S. rank 1 |
8 of 8 checks pass | A |
| 1 |
fresnocountyca.gov
Fresno County, CA U.S. rank 1 |
8 of 8 checks pass | A |
| 1 |
lassencounty.gov
Lassen County, CA U.S. rank 1 |
8 of 8 checks pass | A |
| 1 |
mariposacounty.gov
Mariposa County, CA U.S. rank 1 |
8 of 8 checks pass | A |
| 1 |
countyofmodoc.gov
Modoc County, CA U.S. rank 1 |
8 of 8 checks pass | A |
| 1 |
monocounty.ca.gov
Mono County, CA U.S. rank 1 |
8 of 8 checks pass | A |
| 1 |
nevadacountyca.gov
Nevada County, CA U.S. rank 1 |
8 of 8 checks pass | A |
| 1 |
placer.ca.gov
Placer County, CA U.S. rank 1 |
8 of 8 checks pass | A |
| 1 |
santacruzcountyca.gov
Santa Cruz County, CA U.S. rank 1 |
7 of 7 checks pass | A |
| 1 |
sierracounty.ca.gov
Sierra County, CA U.S. rank 1 |
8 of 8 checks pass | A |
| 1 |
tehama.gov
Tehama County, CA U.S. rank 1 |
8 of 8 checks pass | A |
| 2 |
rivco.gov
Riverside County, CA U.S. rank 2 |
8 of 9 checks pass | B |
| 3 |
buttecounty.net
Butte County, CA U.S. rank 3 |
7 of 8 checks pass | B |
| 3 |
contracosta.ca.gov
Contra Costa County, CA U.S. rank 3 |
7 of 8 checks pass | B |
| 3 |
eldoradocounty.ca.gov
El Dorado County, CA U.S. rank 3 |
7 of 8 checks pass | B |
| 3 |
humboldtgov.org
Humboldt County, CA U.S. rank 3 |
7 of 8 checks pass | B |
| 3 |
lakecountyca.gov
Lake County, CA U.S. rank 3 |
7 of 8 checks pass | B |
| 3 |
countyofmerced.com
Merced County, CA U.S. rank 3 |
7 of 8 checks pass | B |
| 3 |
napacounty.gov
Napa County, CA U.S. rank 3 |
7 of 8 checks pass | B |
| 3 |
plumascounty.us
Plumas County, CA U.S. rank 3 |
7 of 8 checks pass | B |
| 3 |
trinitycounty.org
Trinity County, CA U.S. rank 3 |
7 of 8 checks pass | B |
| 3 |
venturacounty.gov
Ventura County, CA U.S. rank 3 |
7 of 8 checks pass | B |
| 4 |
calaverasgov.us
Calaveras County, CA U.S. rank 4 |
6 of 7 checks pass | B |
| 4 |
lacounty.gov
Los Angeles County, CA U.S. rank 4 |
6 of 7 checks pass | B |
| 4 |
saccounty.gov
Sacramento County, CA U.S. rank 4 |
6 of 7 checks pass | B |
| 4 |
main.sbcounty.gov
San Bernardino County, CA U.S. rank 4 |
6 of 7 checks pass | B |
| 4 |
sf.gov
San Francisco, CA U.S. rank 4 |
6 of 7 checks pass | B |
| 4 |
slocounty.ca.gov
San Luis Obispo County, CA U.S. rank 4 |
6 of 7 checks pass | B |
| 4 |
siskiyoucounty.gov
Siskiyou County, CA U.S. rank 4 |
6 of 7 checks pass | B |
| 4 |
stancounty.com
Stanislaus County, CA U.S. rank 4 |
6 of 7 checks pass | B |
| 4 |
yuba.gov
Yuba County, CA U.S. rank 4 |
6 of 7 checks pass | B |
| 5 |
inyocounty.us
Inyo County, CA U.S. rank 6 |
7 of 9 checks pass | C |
| 6 |
sandiegocounty.gov
County of San Diego, CA U.S. rank 7 |
6 of 8 checks pass | C |
| 6 |
imperialcounty.org
Imperial County, CA U.S. rank 7 |
6 of 8 checks pass | C |
| 6 |
ocgov.com
Orange County, CA U.S. rank 7 |
6 of 8 checks pass | C |
| 7 |
acgov.org
Alameda County, CA U.S. rank 8 |
5 of 7 checks pass | C |
| 7 |
co.del-norte.ca.us
Del Norte County, CA U.S. rank 8 |
5 of 7 checks pass | C |
| 7 |
sjgov.org
San Joaquin County, CA U.S. rank 8 |
5 of 7 checks pass | C |
| 8 |
countyofsb.org
Santa Barbara County, CA U.S. rank 9 |
6 of 9 checks pass | D |
|
countyofcolusaca.gov
Colusa County, CA |
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 | - | |
|
countyofglenn.net
Glenn County, CA |
Not fully scanned, so not graded. We couldn't fully scan your site because it responded without any page content. Status 995 | - | |
|
kerncounty.com
Kern County, CA |
Not fully scanned, so not graded. We couldn't fully scan your site because it responded without any page content. Status 995 | - | |
|
countyofkingsca.gov
Kings County, CA |
Not fully scanned, so not graded. We couldn't fully scan your site because it responded without any page content. Status 995 | - | |
|
maderacounty.com
Madera County, CA |
Not fully scanned, so not graded. We couldn't fully scan your site because it responded without any page content. Status 995 | - | |
|
parks.marincounty.gov
Marin County Parks, CA |
Not fully scanned, so not graded. We couldn't fully scan your site because it responded without any page content. Status 995 | - | |
|
marincounty.gov
Marin County, CA |
Not fully scanned, so not graded. We couldn't fully scan your site because it responded without any page content. Status 995 | - | |
|
mendocinocounty.gov
Mendocino County, CA |
Not fully scanned, so not graded. We couldn't fully scan your site because it responded without any page content. Status 995 | - | |
|
countyofmonterey.gov
Monterey County, CA |
Not fully scanned, so not graded. We couldn't fully scan your site because it responded without any page content. Status 995 | - | |
|
sanbenitocountyca.gov
San Benito County, CA |
Not fully scanned, so not graded. We couldn't fully scan your site because it responded without any page content. Status 995 | - | |
|
shastacounty.gov
Shasta County, CA |
Not fully scanned, so not graded. We couldn't fully scan your site because it responded without any page content. Status 995 | - | |
|
suttercounty.org
Sutter County, CA |
Not fully scanned, so not graded. We couldn't fully scan your site because it responded without any page content. Status 995 | - | |
|
yolocounty.gov
Yolo County, CA |
Not fully scanned, so not graded. We weren't able to fully scan your site. Status 403 | - |
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:
- CISA Website Security
- 21st Century Integrated Digital Experience Act (IDEA)
- CISA Cybersecurity Performance Goals
- RFC 9116
- OWASP Top 10
- U.S. Federal Website Standards
Standards
- Content security policy (CSP)
- HTTP Strict Transport Security (HSTS)
- security.txt
- X-Content-Type-Options
- Errors in the console
- Clickjacking mitigation
- Paste preventing inputs
- Hypertext Transfer Protocol Secure (HTTPS)
- Sponsored top-level domain (sTLD)
Grades/scores
ScanGov
About this data
ScanGov scans the homepage of each county government site on our county list in California. Scores come from the checks listed on standards.scangov.org. Sites were scanned between 8/24/2026 and 9/17/2026; 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 13 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.