California Health Interview Survey


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 Hundreds of health statistics


The 2018 CHIS includes thousands of new and updated health estimates on topics ranging from uninsurance to immigration status to soda consumption and chronic disease prevalence.

Learn more about our sample and the questions we ask.


 Did you know?


CHIS is one of the few sources of representative data on lesbian, gay, bisexual and transgender populations.

CHIS Facts

1,000,000+ Visitors to the CHIS/UCLA Center for Health Policy Research website.
120,000+ Queries made through AskCHIS in the last 12 months.
1,100,000+ Queries made through AskCHIS since the inception of CHIS in 2002.
63,558 Registered AskCHIS and AskCHIS NE users



Public Use Files downloaded since the inception of CHIS in 2002.

Number of advocacy and community representatives trained by the Center's Health DATA Program to use CHIS data.