What is CHIS?
Get information about the largest state health survey in the nation, including who CHIS interviews, what topics are covered, how CHIS is used, and the impact CHIS is making in California and across the nation.
Are You in the Survey?
Have you been selected to take the California Health Survey? Learn more about why your participation matters and how to get started on taking the survey.
Access CHIS Data
Free and easy-to-use online health query tools. Comprehensive public use files in SAS and STATA. Confidential data and special use research files. CHIS has a variety of data tools available for your research needs.
CHIS Design and Methods
From methodology reports and research, questionnaire and survey topics, to sample design and data quality, learn more about CHIS’ high-quality survey design and methods.
CHIS at a Glance
25,621
households interviewed for the 2024 CHIS
100+
topics covered in the 2024 CHIS
2.1 million+
queries run in AskCHIS and AskCHIS NE since launch
24 million+
different CHIS estimates can be explored in AskCHIS
It becomes like the Bible. It came out of UCLA; it came out of CHIS — you know it’s reliable.
Richard FigueroaDeputy Cabinet Secretary, Office of the Governor Gavin Newsom Former Acting Director, California Department of Health Care Services
CHIS 2025 Making an Impact
The 2025 California Health Interview Survey (CHIS) Making an Impact report shows our latest research and that of people who use our data — our funders, researchers, health departments, government agencies, journalists, nonprofit organizations, and community groups — who share a goal to make the people of California healthier and stronger.
CHIS Training
Interested in learning how to use our online query tools AskCHIS and AskCHIS Neighborhood Edition? Visit our training website for online tutorials on various CHIS data products.
CHIS in Publications
Each year, the UCLA Center for Health Policy Research produces reports, policy briefs, fact sheets, and infographics using CHIS data. In addition, CHIS data are featured in peer-reviewed articles at prestigious journals. Take a look at some of the publications featuring CHIS.
CHIS Making an Impact
CHIS Making an Impact annual reports look back at the exciting work produced by CHIS.