California 2012 Population By County
Updated on December 2, 2021.

According to the US Census Bureau population estimates, there were 37,944,551 people living in California in 2012. Los Angeles County was the most populated county with 9,931,394 residents, followed by San Diego County with 3,175,148 residents, and Orange County with 3,078,710 residents. Alpine County with a population of 1,111 was the least populated county in California in 2012.

Use the map below to interactively explore the population of each county in California in 2012. The data can also be explored further by sorting and filtering with the table below.

California 2012 Population By County
See also Population estimate for other years:
Table of California 2012 Population By County
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County Population % of State Population
Alameda 1,553,729 4.10
Alpine 1,111 0.00
Amador 37,105 0.10
Butte 220,877 0.58
Calaveras 44,816 0.12
Colusa 21,274 0.06
Contra Costa 1,077,439 2.84
Del Norte 28,195 0.07
El Dorado 180,613 0.48
Fresno 944,779 2.49
Glenn 27,836 0.07
Humboldt 134,597 0.36
Imperial 176,487 0.47
Inyo 18,344 0.05
Kern 854,392 2.25
Kings 150,884 0.40
Lake 63,966 0.17
Lassen 33,622 0.09
Los Angeles 9,931,394 26.17
Madera 151,520 0.40
Marin 256,087 0.68
Mariposa 17,912 0.05
Mendocino 87,293 0.23
Merced 260,776 0.69
Modoc 9,358 0.03
Mono 14,328 0.04
Monterey 424,222 1.12
Napa 138,504 0.37
Nevada 98,165 0.26
Orange 3,078,710 8.11
Placer 360,269 0.95
Plumas 19,380 0.05
Riverside 2,260,763 5.96
Sacramento 1,444,819 3.81
San Benito 56,704 0.15
San Bernardino 2,073,088 5.46
San Diego 3,175,148 8.37
San Francisco 828,963 2.19
San Joaquin 699,444 1.84
San Luis Obispo 274,174 0.72
San Mateo 739,700 1.95
Santa Barbara 429,635 1.13
Santa Clara 1,837,605 4.84
Santa Cruz 266,391 0.70
Shasta 177,908 0.47
Sierra 3,068 0.01
Siskiyou 44,091 0.12
Solano 419,645 1.11
Sonoma 489,784 1.29
Stanislaus 520,336 1.37
Sutter 94,153 0.25
Tehama 63,213 0.17
Trinity 13,494 0.04
Tulare 449,625 1.19
Tuolumne 54,201 0.14
Ventura 833,287 2.20
Yolo 204,558 0.54
Yuba 72,770 0.19