Population of Counties in California (2017)

Name 2017 Population Growth Rate
Los Angeles County10,137,9153.18%
San Diego County3,317,7496.87%
Orange County3,172,5325.13%
Riverside County2,387,7418.42%
San Bernardino County2,140,0964.83%
Santa Clara County1,919,4027.43%
Alameda County1,647,7048.86%
Sacramento County1,514,4606.50%
Contra Costa County1,135,1277.81%
Fresno County979,9155.09%
Kern County884,7885.12%
San Francisco County870,8878.08%
Ventura County849,7382.96%
San Mateo County764,7976.23%
San Joaquin County733,7096.74%
Stanislaus County541,5605.09%
Sonoma County503,0703.76%
Tulare County460,4373.92%
Santa Barbara County446,1705.13%
Solano County440,2076.32%
Monterey County435,2324.52%
Placer County380,5318.65%
San Luis Obispo County282,8874.81%
Santa Cruz County274,6734.33%
Merced County268,6724.61%
Marin County260,6513.05%
Butte County226,8643.13%
Yolo County215,8027.30%
El Dorado County185,6252.47%
Imperial County180,8833.51%
Shasta County179,6311.30%
Madera County154,6972.38%
Kings County149,785-1.70%
Napa County142,1663.91%
Humboldt County136,6461.20%
Nevada County99,1070.33%
Sutter County96,6511.95%
Mendocino County87,628-0.20%
Yuba County75,2754.05%
Lake County64,116-0.97%
Tehama County63,276-0.46%
San Benito County59,4146.95%
Tuolumne County53,804-2.50%
Calaveras County45,171-0.64%
Siskiyou County43,603-2.97%
Amador County37,383-1.28%
Lassen County30,870-11.39%
Glenn County28,085-0.09%
Del Norte County27,540-3.58%
Colusa County21,5880.66%
Plumas County18,627-6.48%
Inyo County18,144-1.99%
Mariposa County17,410-4.65%
Mono County13,981-1.86%
Trinity County12,782-7.14%
Modoc County8,795-9.28%
Sierra County2,947-8.48%
Alpine County1,071-7.67%