The Demographic Research Unit (DRU) of the California Department of Finance is designated as the single official source of demographic data for state planning and budgeting. Download a Unit overview brochure.

2020 Census

Housing Unit Survey

The Demographic Research Unit collects housing unit change data from every city and county in California each year to produce annual population estimates as mandated by Article XIIIB of the California Constitution.


  • Estimates – Official population estimates of the state, counties and cities produced by the Demographic Research Unit for state planning and budgeting.
  • Projections – Forecasts of population, births and public school enrollment at the state and county level produced by the Demographic Research Unit.
  • State Census Data Center – Demographic, social, economic, migration, and housing data from the decennial censuses, the American Community Survey, the Current Population Survey, and other special and periodic surveys.
  • Data In Action – Interactive visualizations, charts, and maps that illustrate the data that the DRU tabulates and produces.
  • DRU Data Hub – DRU’s interactive data portal for exploring, sharing, and visualizing data. It includes maps, dashboards, and other applications featuring a range of demographic, housing and socioeconomic data.

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