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California Counties by Population

List the counties of California in order of population, from most to least.
Populations are 2019 estimates according to the US Census Bureau.
Quiz by fowlereid
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Last updated: February 28, 2021
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First submittedFebruary 28, 2021
Times taken59
Average score55.2%
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Population
County
10,039,107
Los Angeles
3,338,330
San Diego
3,175,692
Orange
2,470,546
Riverside
2,180,085
San Bernardino
1,927,852
Santa Clara
1,671,329
Alameda
1,552,058
Sacramento
1,153,526
Contra Costa
999,101
Fresno
900,202
Kern
881,549
San Francisco
846,006
Ventura
767,423
San Mateo
762,148
San Joaquin
550,660
Stanislaus
494,336
Sonoma
466,195
Tulare
447,643
Solano
446,499
Santa Barbara
Population
County
434,061
Monterey
398,329
Placer
283,111
San Luis Obispo
277,680
Merced
273,213
Santa Cruz
258,826
Marin
220,500
Yolo
219,186
Butte
192,843
El Dorado
181,215
Imperial
180,080
Shasta
157,327
Madera
152,940
Kings
137,744
Napa
135,558
Humboldt
99,755
Nevada
96,971
Sutter
86,749
Mendocino
78,668
Yuba
Population
County
65,084
Tehama
64,386
Lake
62,808
San Benito
54,478
Tuolumne
45,514
Calaveras
43,468
Siskiyou
38,429
Amador
30,573
Lassen
27,976
Glenn
27,812
Del Norte
21,454
Colusa
18,660
Plumas
17,977
Inyo
17,420
Mariposa
14,310
Mono
12,700
Trinity
8,907
Modoc
3,040
Sierra
1,039
Alpine
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