Showing California county sites. All U.S. county sites
F 46
Average usability score of 40 fully scanned California county sites
17th
of 49 states, ranked by average usability score
40 of 57
Sites fully scanned. We couldn't fully scan 17, so they're listed without grades
F 48
U.S. county average usability score, 2467 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 | 1 |
| 30 to 39 | 17 |
| 40 to 49 | 5 |
| 50 to 59 | 8 |
| 60 to 69 | 6 |
| 70 to 79 | 2 |
| 80 to 89 | 1 |
| 90 to 100 | 0 |
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
3 of the 57 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.: 2467 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 | 0% (0) | 8% (3) | 93% (37) |
| All U.S. counties | 2% (39) | 16% (403) | 82% (2,025) |
Top 3 California county sites by usability score
#1 in California · U.S. rank 4
Imperial County, CA
B 87 usability
- Accessibility B
- Botability C
- Security C
- Usability B
- Readability F
#2 in California · U.S. rank 9
County of Solano, CA
C 75 usability
- Accessibility A
- Botability B
- Security A
- Usability C
- Readability F
#2 in California · U.S. rank 9
San Bernardino County, CA
C 75 usability
- Accessibility B
- Botability C
- Security C
- Usability C
- Readability A
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 description. The page has a description for social media previews. Shared links have no description on social media.
- Open Graph site name. The site has a name for social media and browser display. Site name missing in social media shares.
- 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 |
imperialcounty.org
Imperial County, CA U.S. rank 4 |
14 of 16 checks pass | B |
| 2 |
solanocounty.gov
County of Solano, CA U.S. rank 9 |
12 of 16 checks pass | C |
| 2 |
main.sbcounty.gov
San Bernardino County, CA U.S. rank 9 |
12 of 16 checks pass | C |
| 3 |
rivco.gov
Riverside County, CA U.S. rank 12 |
11 of 16 checks pass | D |
| 4 |
co.del-norte.ca.us
Del Norte County, CA U.S. rank 15 |
10 of 16 checks pass | D |
| 4 |
parks.marincounty.gov
Marin County Parks, CA U.S. rank 15 |
10 of 16 checks pass | D |
| 4 |
ocgov.com
Orange County, CA U.S. rank 15 |
10 of 16 checks pass | D |
| 5 |
placer.ca.gov
Placer County, CA U.S. rank 16 |
9 of 15 checks pass | D |
| 5 |
sjgov.org
San Joaquin County, CA U.S. rank 16 |
9 of 15 checks pass | D |
| 6 |
acgov.org
Alameda County, CA U.S. rank 18 |
9 of 16 checks pass | F |
| 6 |
stancounty.com
Stanislaus County, CA U.S. rank 18 |
9 of 16 checks pass | F |
| 7 |
eldoradocounty.ca.gov
El Dorado County, CA U.S. rank 20 |
8 of 16 checks pass | F |
| 7 |
fresnocountyca.gov
Fresno County, CA U.S. rank 20 |
8 of 16 checks pass | F |
| 7 |
mendocinocounty.gov
Mendocino County, CA U.S. rank 20 |
8 of 16 checks pass | F |
| 7 |
sf.gov
San Francisco, CA U.S. rank 20 |
8 of 16 checks pass | F |
| 7 |
santacruzcountyca.gov
Santa Cruz County, CA U.S. rank 20 |
8 of 16 checks pass | F |
| 7 |
siskiyoucounty.gov
Siskiyou County, CA U.S. rank 20 |
8 of 16 checks pass | F |
| 8 |
saccounty.gov
Sacramento County, CA U.S. rank 21 |
7 of 15 checks pass | F |
| 8 |
yuba.gov
Yuba County, CA U.S. rank 21 |
7 of 15 checks pass | F |
| 9 |
calaverasgov.us
Calaveras County, CA U.S. rank 22 |
7 of 16 checks pass | F |
| 9 |
lacounty.gov
Los Angeles County, CA U.S. rank 22 |
7 of 16 checks pass | F |
| 10 |
slocounty.ca.gov
San Luis Obispo County, CA U.S. rank 24 |
6 of 15 checks pass | F |
| 11 |
monocounty.ca.gov
Mono County, CA U.S. rank 25 |
6 of 16 checks pass | F |
| 11 |
countyofsb.org
Santa Barbara County, CA U.S. rank 25 |
6 of 16 checks pass | F |
| 11 |
venturacounty.gov
Ventura County, CA U.S. rank 25 |
6 of 16 checks pass | F |
| 12 |
alpinecountyca.gov
Alpine County, CA U.S. rank 27 |
5 of 15 checks pass | F |
| 12 |
buttecounty.net
Butte County, CA U.S. rank 27 |
5 of 15 checks pass | F |
| 12 |
inyocounty.us
Inyo County, CA U.S. rank 27 |
5 of 15 checks pass | F |
| 12 |
lakecountyca.gov
Lake County, CA U.S. rank 27 |
5 of 15 checks pass | F |
| 12 |
mariposacounty.gov
Mariposa County, CA U.S. rank 27 |
5 of 15 checks pass | F |
| 12 |
countyofmerced.com
Merced County, CA U.S. rank 27 |
5 of 15 checks pass | F |
| 12 |
plumascounty.us
Plumas County, CA U.S. rank 27 |
5 of 15 checks pass | F |
| 12 |
sierracounty.ca.gov
Sierra County, CA U.S. rank 27 |
5 of 15 checks pass | F |
| 12 |
tehama.gov
Tehama County, CA U.S. rank 27 |
5 of 15 checks pass | F |
| 12 |
trinitycounty.org
Trinity County, CA U.S. rank 27 |
5 of 15 checks pass | F |
| 13 |
humboldtgov.org
Humboldt County, CA U.S. rank 28 |
5 of 16 checks pass | F |
| 13 |
lassencounty.gov
Lassen County, CA U.S. rank 28 |
5 of 16 checks pass | F |
| 13 |
countyofmodoc.gov
Modoc County, CA U.S. rank 28 |
5 of 16 checks pass | F |
| 13 |
nevadacountyca.gov
Nevada County, CA U.S. rank 28 |
5 of 16 checks pass | F |
| 14 |
countyofcolusaca.gov
Colusa County, CA U.S. rank 30 |
4 of 15 checks pass | F |
|
amadorgov.org
Amador County, CA |
Not fully scanned, so not graded. We weren't able to fully scan your site. Status 403 | - | |
|
contracosta.ca.gov
Contra Costa County, CA |
Not fully scanned, so not graded. We weren't able to fully scan your site. Status 999 | - | |
|
sdparks.org
County of San Diego, CA |
Not fully scanned, so not graded. We couldn't scan your site because the page never finished loading in our browser. Status 994 | - | |
|
sddac.com
County of San Diego, CA |
Not fully scanned, so not graded. We couldn't scan your site because the page never finished loading in our browser. Status 994 | - | |
|
sandiegocounty.gov
County of San Diego, CA |
Not fully scanned, so not graded. We weren't able to fully scan your site. Status 999 | - | |
|
countyofglenn.net
Glenn 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 | - | |
|
kerncounty.com
Kern County, CA |
Not fully scanned, so not graded. We weren't able to fully scan your site. Status 403 | - | |
|
countyofkingsca.gov
Kings County, CA |
Not fully scanned, so not graded. We weren't able to fully scan your site. Status 403 | - | |
|
maderacounty.com
Madera County, CA |
Not fully scanned, so not graded. We weren't able to fully scan your site. Status 403 | - | |
|
marincounty.gov
Marin 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 | - | |
|
countyofmonterey.gov
Monterey County, CA |
Not fully scanned, so not graded. We weren't able to fully scan your site. Status 403 | - | |
|
napacounty.gov
Napa 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 weren't able to fully scan your site. Status 403 | - | |
|
shastacounty.gov
Shasta 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 | - | |
|
suttercounty.org
Sutter County, CA |
Not fully scanned, so not graded. We weren't able to fully scan your site. Status 403 | - | |
|
tuolumnecounty.ca.gov
Tuolumne 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 | - | |
|
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
- Google Search Central
- Web Vitals / Core Web Vitals
- Open Graph
Standards
- Page title
- Page description
- 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 ranking
About this data
ScanGov scans the homepage of each county site on our county list in California. Scores come from the checks in the ScanGov standards. Sites were scanned between 9/30/2026 and 11/6/2026. Each site's report shows its own scan date. A site counts as fully scanned when its homepage loaded and sent us its page content. Averages, grade shares, failure rates, and ranks use fully scanned sites only. We could not fully scan 17 sites. They did not respond, blocked the scanner, or sent no page content. They appear in the table without grades, with their scan status, and are left out of every figure. Grades follow the ScanGov grade scale. Rank follows the ScanGov ranking method. The full dataset, with every county's raw results, is in the ScanGov data repository.