California 2013 Population By County
Updated on December 2, 2021.

According to the US Census Bureau population estimates, there were 38,253,768 people living in California in 2013. Los Angeles County was the most populated county with 9,987,189 residents, followed by San Diego County with 3,210,788 residents, and Orange County with 3,105,262 residents. Alpine County with a population of 1,131 was the least populated county in California in 2013.

Use the map below to interactively explore the population of each county in California in 2013. The data can also be explored further by sorting and filtering with the table below.

California 2013 Population By County
See also Population estimate for other years:
Table of California 2013 Population By County
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County Population % of State Population
Alameda 1,579,508 4.13
Alpine 1,131 0.00
Amador 36,624 0.10
Butte 221,649 0.58
Calaveras 44,658 0.12
Colusa 21,239 0.06
Contra Costa 1,093,253 2.86
Del Norte 27,821 0.07
El Dorado 181,529 0.48
Fresno 951,143 2.49
Glenn 27,784 0.07
Humboldt 134,447 0.35
Imperial 176,301 0.46
Inyo 18,348 0.05
Kern 862,727 2.26
Kings 150,237 0.39
Lake 63,811 0.17
Lassen 32,128 0.08
Los Angeles 9,987,189 26.11
Madera 151,295 0.40
Marin 258,441 0.68
Mariposa 17,840 0.05
Mendocino 87,070 0.23
Merced 261,888 0.69
Modoc 9,154 0.02
Mono 14,064 0.04
Monterey 426,163 1.11
Napa 139,522 0.37
Nevada 97,969 0.26
Orange 3,105,262 8.12
Placer 365,415 0.96
Plumas 18,901 0.05
Riverside 2,286,087 5.98
Sacramento 1,457,283 3.81
San Benito 57,320 0.15
San Bernardino 2,082,101 5.44
San Diego 3,210,788 8.39
San Francisco 839,695 2.19
San Joaquin 701,831 1.84
San Luis Obispo 275,713 0.72
San Mateo 749,131 1.96
Santa Barbara 434,503 1.14
Santa Clara 1,866,050 4.88
Santa Cruz 268,836 0.70
Shasta 178,447 0.47
Sierra 3,031 0.01
Siskiyou 43,550 0.11
Solano 423,634 1.11
Sonoma 493,870 1.29
Stanislaus 523,313 1.37
Sutter 94,457 0.25
Tehama 62,878 0.16
Trinity 13,427 0.04
Tulare 452,259 1.18
Tuolumne 53,975 0.14
Ventura 837,729 2.19
Yolo 206,267 0.54
Yuba 73,082 0.19