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RANKING · 2024 ACS · 55 SHOWN OF 55

Highest Czech population share, California counties

California counties ranked by the share of all residents who are Czech ancestry (2024 American Community Survey). A concentration measure: Czech residents as a percentage of total population. This list covers the 55 counties in California that qualify, ranked against each other statewide. The median across all 55 is 0.2%. Biggest climber in the top 100 since 2020: San Benito County, CA, up 40 places to #14.

Czech Americans: full group profile →
SAME RANKING BYCitiesStatesMetros
Highest Czech population share by state
All USAlaskaAlabamaArkansasArizonaCaliforniaColoradoFloridaGeorgiaIowaIdahoIllinoisIndianaKansasKentuckyLouisianaMassachusettsMarylandMaineMichiganMinnesotaMissouriMississippiMontanaNorth CarolinaNorth DakotaNebraskaNew HampshireNew JerseyNew MexicoNevadaNew YorkOhioOklahomaOregonPennsylvaniaSouth CarolinaSouth DakotaTennesseeTexasUtahVirginiaVermontWashingtonWisconsinWest VirginiaWyoming
RANKPLACESTATEPOPCZECH SHAREVS 2010
01▲2Plumas County, CACA18,5830.8%−0.4 pts
02▲2Santa Cruz County, CACA258,8520.5%0.0 pts
03▲6Marin County, CACA253,6940.5%−0.1 pts
04▲18Mendocino County, CACA88,1220.4%−0.3 pts
05Del Norte County, CACA26,4100.4%−0.1 pts
06▲9Butte County, CACA209,2110.4%−0.1 pts
07▲23El Dorado County, CACA192,3230.4%0.0 pts
08▲4Sonoma County, CACA486,4440.4%−0.1 pts
09▲20Inyo County, CACA18,1580.3%−0.2 pts
10▲39Amador County, CACA41,8760.3%+0.2 pts
11▲13Yolo County, CACA224,4100.3%0.0 pts
12▲5Ventura County, CACA830,8510.3%0.0 pts
13▲10Placer County, CACA442,0810.3%−0.1 pts
14▲40San Benito County, CACA70,0820.3%−0.2 pts
15▲25Lassen County, CACA28,1170.3%−0.3 pts
16▼6Shasta County, CACA181,6480.3%−0.1 pts
17▲14Siskiyou County, CACA42,0130.3%−0.2 pts
18▼11San Luis Obispo County, CACA282,3670.3%−0.3 pts
19▲9Tuolumne County, CACA53,1600.3%−0.1 pts
20▼14Nevada County, CACA101,9110.3%−0.2 pts
21▼10San Mateo County, CACA743,5680.3%−0.1 pts
22▲4Contra Costa County, CACA1,170,0700.3%−0.1 pts
23▼10San Francisco County, CACA826,0790.2%−0.1 pts
24▲1San Diego County, CACA3,282,2480.2%−0.1 pts
25▼4Napa County, CACA132,9490.2%0.0 pts
26▼7Orange County, CACA3,149,5070.2%−0.1 pts
27▲14Modoc County, CACA8,4260.2%−0.5 pts
28▲16Tehama County, CACA64,6650.2%0.0 pts
29▲7Santa Clara County, CACA1,914,3910.2%−0.1 pts
30▲8Sutter County, CACA98,7870.2%−0.2 pts
31▲2Sacramento County, CACA1,618,4600.2%−0.1 pts
32▼24Humboldt County, CACA131,6470.2%−0.2 pts
33▲6Lake County, CACA67,7720.2%−0.2 pts
34Alameda County, CACA1,636,6300.2%0.0 pts
35▼3Riverside County, CACA2,544,9160.2%−0.1 pts
36▼16Santa Barbara County, CACA442,0650.2%−0.2 pts
37▼2Monterey County, CACA433,7290.2%−0.2 pts
38▲4Los Angeles County, CACA9,694,9340.1%0.0 pts
39▲6Fresno County, CACA1,035,4560.1%0.0 pts
40▲7Solano County, CACA455,3760.1%0.0 pts
41▼14Madera County, CACA167,9270.1%0.0 pts
42▲13Calaveras County, CACA46,6050.1%−0.3 pts
43▲3San Joaquin County, CACA823,8150.1%0.0 pts
44▲6San Bernardino County, CACA2,224,0910.1%−0.1 pts
45▲6Kern County, CACA927,0680.1%−0.1 pts
46▼3Glenn County, CACA28,1410.1%0.0 pts
47▼10Yuba County, CACA88,6910.1%0.0 pts
48▲5Stanislaus County, CACA557,7190.1%0.0 pts
49▼35Mariposa County, CACA16,9180.1%–
50▼2Kings County, CACA154,3270.1%0.0 pts
51▲5Imperial County, CACA181,4110.0%0.0 pts
52Tulare County, CACA485,1460.0%−0.1 pts
53▲5Colusa County, CACA21,8360.0%−0.1 pts
54▲3Merced County, CACA297,2600.0%0.0 pts
55▼39Trinity County, CACA15,7200.0%−0.8 pts
SHOWING 1–55 OF 55

UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES