Ranking of California Counties By Population with Australian Ancestry in 2021

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 20.23K people in California with Australian ancestry. Among all California counties, Los Angeles County had the highest population with Australian ancestry (5.67K), followed by Orange County (1.60K), and San Diego County (1.33K).

The chart and table below shows the top 10 counties with high number of people with Australian ancestry.

You can see similar information for other states and for other ancestry groups in California.

Data Source: US Census Bureau.
Ranking of California Counties By Population with Australian Ancestry in 2021
Los Angeles County
Orange County
San Diego County
San Francisco County
Santa Clara County
Contra Costa County
Riverside County
San Bernardino County
Sacramento County
Alameda County
Ranking of California Counties By Population with Australian Ancestry in 2021
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Rank County Population
1 Los Angeles County 5673
2 Orange County 1595
3 San Diego County 1330
4 San Francisco County 1239
5 Santa Clara County 1187
6 Contra Costa County 1119
7 Riverside County 971
8 San Bernardino County 915
9 Sacramento County 636
10 Alameda County 611
11 Ventura County 593
12 San Mateo County 462
13 Marin County 447
14 Sonoma County 396
15 Santa Barbara County 327
16 Placer County 322
17 San Joaquin County 281
18 San Luis Obispo County 249
19 El Dorado County 210
20 Monterey County 192
21 Stanislaus County 154
22 Fresno County 140
23 Butte County 115
23 Nevada County 115
24 Tehama County 111
25 Napa County 103
26 Merced County 87
27 Kern County 85
27 Solano County 85
28 Santa Cruz County 84
29 Yolo County 82
30 Shasta County 69
31 Amador County 67
32 Tulare County 42
33 Tuolumne County 33
34 Lassen County 31
35 Siskiyou County 23
36 Lake County 11
36 Sutter County 11
37 Humboldt County 10
38 Madera County 6
39 Kings County 2
39 Modoc County 2
39 San Benito County 2
40 Yuba County 1