Showing California county sites. All U.S. county sites
F 47
Average usability score of 40 fully scanned California county sites
15th
of 48 states, ranked by average usability score
40 of 53
Sites fully scanned. We couldn't fully scan 13, so they're listed without grades
F 49
U.S. county average usability 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 usability 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 | 4 |
| 30 to 39 | 12 |
| 40 to 49 | 9 |
| 50 to 59 | 9 |
| 60 to 69 | 2 |
| 70 to 79 | 2 |
| 80 to 89 | 1 |
| 90 to 100 | 1 |
California counties by usability 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 usability 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 | 3% (1) | 8% (3) | 90% (36) |
| All U.S. counties | 1% (24) | 18% (436) | 81% (1,975) |
Top 3 California county sites by usability score
#1 in California · U.S. rank 2
County of San Diego, CA
A 94 usability
- Accessibility A
- Botability B
- Security C
- Usability A
#2 in California · U.S. rank 6
San Bernardino County, CA
B 82 usability
- Accessibility B
- Botability C
- Security B
- Usability B
#3 in California · U.S. rank 8
Imperial County, CA
C 76 usability
- Accessibility B
- Botability C
- Security C
- Usability C
What each check means
- Open Graph image alt. The social media preview image has alt text for screen readers. Screen readers cannot describe shared images.
- Open Graph site name. The site has a name for social media and browser display. Site name missing in social media shares.
- Open Graph description. The page has a description for social media previews. Shared links have no description on social media.
- Open Graph image. The page has a preview image for social media cards. Shared links have no image on social media.
- Open Graph type. The page declares its content type for social media cards. Social media shows wrong content type.
All California county sites by usability score
| Rank | Site | Checks passed | Grade |
|---|---|---|---|
| 1 |
sandiegocounty.gov
County of San Diego, CA U.S. rank 2 |
16 of 17 checks pass | A |
| 2 |
main.sbcounty.gov
San Bernardino County, CA U.S. rank 6 |
14 of 17 checks pass | B |
| 3 |
imperialcounty.org
Imperial County, CA U.S. rank 8 |
13 of 17 checks pass | C |
| 4 |
co.del-norte.ca.us
Del Norte County, CA U.S. rank 10 |
12 of 17 checks pass | C |
| 5 |
ocgov.com
Orange County, CA U.S. rank 12 |
11 of 17 checks pass | D |
| 5 |
rivco.gov
Riverside County, CA U.S. rank 12 |
11 of 17 checks pass | D |
| 6 |
placer.ca.gov
Placer County, CA U.S. rank 14 |
10 of 17 checks pass | F |
| 6 |
sjgov.org
San Joaquin County, CA U.S. rank 14 |
10 of 17 checks pass | F |
| 7 |
acgov.org
Alameda County, CA U.S. rank 16 |
9 of 17 checks pass | F |
| 7 |
solanocounty.gov
County of Solano, CA U.S. rank 16 |
9 of 17 checks pass | F |
| 7 |
eldoradocounty.ca.gov
El Dorado County, CA U.S. rank 16 |
9 of 17 checks pass | F |
| 7 |
fresnocountyca.gov
Fresno County, CA U.S. rank 16 |
9 of 17 checks pass | F |
| 7 |
saccounty.gov
Sacramento County, CA U.S. rank 16 |
9 of 17 checks pass | F |
| 7 |
sf.gov
San Francisco, CA U.S. rank 16 |
9 of 17 checks pass | F |
| 7 |
siskiyoucounty.gov
Siskiyou County, CA U.S. rank 16 |
9 of 17 checks pass | F |
| 8 |
calaverasgov.us
Calaveras County, CA U.S. rank 18 |
8 of 17 checks pass | F |
| 8 |
lacounty.gov
Los Angeles County, CA U.S. rank 18 |
8 of 17 checks pass | F |
| 8 |
monocounty.ca.gov
Mono County, CA U.S. rank 18 |
8 of 17 checks pass | F |
| 8 |
napacounty.gov
Napa County, CA U.S. rank 18 |
8 of 17 checks pass | F |
| 8 |
stancounty.com
Stanislaus County, CA U.S. rank 18 |
8 of 17 checks pass | F |
| 8 |
yuba.gov
Yuba County, CA U.S. rank 18 |
8 of 17 checks pass | F |
| 9 |
buttecounty.net
Butte County, CA U.S. rank 20 |
7 of 17 checks pass | F |
| 9 |
countyofmodoc.gov
Modoc County, CA U.S. rank 20 |
7 of 17 checks pass | F |
| 9 |
santacruzcountyca.gov
Santa Cruz County, CA U.S. rank 20 |
7 of 17 checks pass | F |
| 10 |
alpinecountyca.gov
Alpine County, CA U.S. rank 22 |
6 of 17 checks pass | F |
| 10 |
contracosta.ca.gov
Contra Costa County, CA U.S. rank 22 |
6 of 17 checks pass | F |
| 10 |
humboldtgov.org
Humboldt County, CA U.S. rank 22 |
6 of 17 checks pass | F |
| 10 |
inyocounty.us
Inyo County, CA U.S. rank 22 |
6 of 17 checks pass | F |
| 10 |
lakecountyca.gov
Lake County, CA U.S. rank 22 |
6 of 17 checks pass | F |
| 10 |
lassencounty.gov
Lassen County, CA U.S. rank 22 |
6 of 17 checks pass | F |
| 10 |
mariposacounty.gov
Mariposa County, CA U.S. rank 22 |
6 of 17 checks pass | F |
| 10 |
countyofmerced.com
Merced County, CA U.S. rank 22 |
6 of 17 checks pass | F |
| 10 |
nevadacountyca.gov
Nevada County, CA U.S. rank 22 |
6 of 17 checks pass | F |
| 10 |
slocounty.ca.gov
San Luis Obispo County, CA U.S. rank 22 |
6 of 17 checks pass | F |
| 10 |
sierracounty.ca.gov
Sierra County, CA U.S. rank 22 |
6 of 17 checks pass | F |
| 10 |
venturacounty.gov
Ventura County, CA U.S. rank 22 |
6 of 17 checks pass | F |
| 11 |
plumascounty.us
Plumas County, CA U.S. rank 24 |
5 of 17 checks pass | F |
| 11 |
countyofsb.org
Santa Barbara County, CA U.S. rank 24 |
5 of 17 checks pass | F |
| 11 |
tehama.gov
Tehama County, CA U.S. rank 24 |
5 of 17 checks pass | F |
| 11 |
trinitycounty.org
Trinity County, CA U.S. rank 24 |
5 of 17 checks pass | F |
|
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 usability
Optimize content structure so users quickly find what they need.
Why it's important
Well-written pages help people understand laws, services, and procedures without confusion, reducing calls and office visits.
Risks
- Users cannot understand your information.
Guidance
What we use to grade usability:
- 21st Century Integrated Digital Experience Act (IDEA)
- U.S. Federal Website Standards
- Automated Readability Index (ARI)
- Flesch-Kincaid (FK)
- Plain Writing Act of 2010
- Google Search Central
- Web Vitals / Core Web Vitals
- Open Graph
Standards
- Page title
- Page description
- Readability
- Viewport meta tag
- www resolution
- Cumulative Layout Shift (CLS)
- First Contentful Paint (FCP)
- Interaction to Next Paint (INP)
- Largest Contentful Paint (LCP)
- Time to First Byte (TTFB)
- Open Graph site name
- Open Graph type
- Open Graph title
- Open Graph description
- Open Graph URL
- Open Graph image
- Open Graph image alt
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.