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CDPH Monthly Update on Number of Zika Infections in California 

June 1, 2026 

The following table provides the number of travel-associated infections with Zika virus in California residents during 2015 to 2026. Travel-associated infections include people exposed through travel to an area affected by Zika, or by contact with a person who recently traveled to an affected area. There have been zero locally acquired Zika infections reported in California. 

Travel-associated Zika infections in California, 2015–2026 ​​(as of June 1, 2026) 

County20262025​

2015-2024 Average (Range)​​

Total0377 (2, 494)
Alameda 00
6 (0, 33)
Butte000 (0, 2)
Contra Costa004 (0, 26)
Fresno001 (0, 7)
Humboldt000 (0, 2)
Imperial000 (0, 1)
Kern001 (0, 5)
Kings 000 (0, 1)
Lake000 (0, 1)
Los Angeles0217 (0, 108)
Marin001 (0, 9)
Mendocino000 (0, 1)
Merced000 (0, 3)
Monterey001 (0, 5)
Napa000 (0, 2)
Nevada000 (0, 1)
Orange005 (0, 31)
Placer000 (0, 1)
Riverside012 (0, 14)
Sacramento001 (0, 7)
San Benito000 (0, 1)
San Bernardino003 (0, 18)
San Diego0012 (0, 82)
San Francisco006 (0, 29)
San Joaquin001 (0, 7)
San Luis Obispo000 (0, 1)
San Mateo002 (0, 12)
Santa Barbara001 (0, 8)
Santa Clara006 (0, 35)
Santa Cruz000 (0, 3)
Solano001 (0, 3)
Sonoma002 (0, 11)
Stanislaus000 (0, 4)
Tulare001 (0, 4)
Ventura001 (0, 9)
Yolo001 (0, 6)
Yuba000 (0, 3)



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