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County rankings · Highest proficiency

California: the counties with the highest-performing public schools

55 counties

California public school districts ranked by enrollment-weighted state-assessment proficiency across the county. Counties need at least 3 schools and 1,000 students to qualify.

#CountyStateSchoolsStudents% Proficient
1Santa Clara CountyCA401230,05957.6%
2Marin CountyCA7129,86757.0%
3San Mateo CountyCA16982,40356.0%
4Placer CountyCA11870,59055.9%
5Orange CountyCA630430,45854.3%
6El Dorado CountyCA6734,70653.8%
7Alameda CountyCA373210,51153.1%
8San Francisco CountyCA12456,50550.6%
9San Diego CountyCA749467,43748.4%
10Contra Costa CountyCA273167,42347.6%
11San Luis Obispo CountyCA8233,33947.5%
12Trinity CountyCA171,46147.2%
13Nevada CountyCA4113,56147.0%
14Los Angeles CountyCA2,1741,265,90745.5%
15Shasta CountyCA9026,63943.6%
16Yolo CountyCA6229,82042.6%
17Ventura CountyCA228147,84141.4%
18Fresno CountyCA352206,07241.2%
19Sacramento CountyCA382259,34240.5%
20Mono CountyCA111,44639.9%
21Tuolumne CountyCA255,72439.9%
22Sonoma CountyCA17063,38939.5%
23Butte CountyCA8729,73039.4%
24Kings CountyCA6328,74239.3%
25Santa Cruz CountyCA7936,31638.3%
26Riverside CountyCA513424,87237.7%
27Napa CountyCA4018,55737.6%
28Inyo CountyCA192,53937.5%
29San Bernardino CountyCA563393,64836.4%
30Sutter CountyCA4323,78435.9%
31Tulare CountyCA192101,49435.9%
32Humboldt CountyCA9117,31935.4%
33Santa Barbara CountyCA12066,19135.3%
34San Joaquin CountyCA243153,02635.1%
35Solano CountyCA10460,76534.9%
36Imperial CountyCA7236,51334.0%
37Mariposa CountyCA151,89333.9%
38San Benito CountyCA2611,63333.5%
39Stanislaus CountyCA184106,47733.5%
40Amador CountyCA144,05032.9%
41Kern CountyCA271197,43132.6%
42Yuba CountyCA4116,04531.9%
43Lassen CountyCA223,75731.7%
44Monterey CountyCA14073,84531.6%
45Siskiyou CountyCA436,05931.5%
46Tehama CountyCA4010,94831.5%
47Madera CountyCA7632,25131.1%
48Merced CountyCA10759,45630.5%
49Colusa CountyCA214,73230.2%
50Plumas CountyCA132,04929.8%

See the national highest proficiency ranking →