The California Health Interview Survey asks the questions. AskCHIS™ gives you the answers.

AskCHIS™ is a free online health query system that allows users to quickly search for health statistics by county, region, and state. Drawing upon the responses of 20,000+ Californians interviewed each year by the California Health Interview Survey (CHIS), AskCHIS™ provides reliable data on a wide range of topics across many sociodemographic factors.

Data can be viewed on screen in tables, charts, and graphs, emailed, and also exported as Excel files. AskCHIS™ includes data beginning in 2001, so users can look at patterns and trends across two decades.

  • Health care access and utilization: including delays in care, barriers to care, source of care, doctor visits, medical debt, emergency room use, long-term care
  • COVID-19: including testing; vaccination; financial, employment, child care, mental health, and racism impacts; risk reduction behaviors; views on government and education; news sources
  • Health insurance: coverage, eligibility, and market experience
  • Health status
  • Health conditions: including asthma, diabetes, heart disease, high blood pressure
  • Health behaviors: including smoking/tobacco, alcohol and drug use, sexual activity, contraceptive use and family planning, and screen use
  • Mental and emotional health
  • Oral health
  • Public program participation
  • Intimate partner violence
  • Child care/parent involvement
  • Positive and adverse childhood experiences
  • Community involvement
  • Climate change
  • Caregiving
  • Encounters with law enforcement
  • Guns/firearms
  • …and more!

Data can be viewed by sociodemographic factors including: racial and ethnic group, age, gender, sexual orientation and gender identity, language, income and poverty level, education, family and marital status, citizenship, and more.

In 2021, there were 368 total variables/topics included in the AskCHIS™ system, which can be used for two-way cross-tabulations with each other, which can be examined for 66 different geographic areas in California, meaning approximately 9 million different CHIS estimates can be explored in AskCHIS™.

Who uses AskCHIS?



Public health departments

Community organizations

Health care providers








AskCHIS™ at a Glance

1.7 million

queries made in AskCHIS™ since its inception


queries made in AskCHIS™ in 2022


AskCHIS™ users