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Methodology
Child Population

IMPORTANT NOTE: The following methodology may include references to report features not available on the public site version. On the public site, masking is performed to protect the privacy of individuals served by CDSS and comply with CDSS data de-identification guidelines. Values of 1 to 10 and calculations based on values of 1 to 10 are masked ('M' or '*'). In stratified views of the data, additional values (the lowest available) are masked to prevent calculation of values 1 to 10.

NOTE: As of the Quarter 3, 2024 data extract, the Child Population Report uses the CA Department of Finance Complete P-3 2020-2070 Population Projections Race/Ethnicity and Sex by Age for California and Counties based on the 2020 Census. This file is used for annual counts for the years 2020 forward. Annual counts for the years 2010-2019 are based on the Complete P-3 2010-2060 Population Projections Race/Ethnicity and Sex by Age for California and Counties based on the 2010 Census. Data for years 2010-2019 will be updated once the Department of Finance releases the intercensal population estimates. Until then, users will observe differences in the population trends between the two files.

These reports summarize the California Department of Finance annual population estimates and projection by county and by age, race/ethnicity, and gender. The child abuse allegation rates, investigation rates, substantiation rates, entry rates and foster care caseload in care rates data available in other reports on this website are based on these population data.

The following table details the specific population data sources by year:

The following table details the specific population data sources by year:
YearSourceLocation
2000-2009California and its Counties Population by Age, Race/Hispanics, and Gender: 2000-2010https://dof.ca.gov/forecasting/Demographics/estimates/annual-intercensal-population-estimates-by-race-ethnicity-with-age-and-gender-detail/
2010-2019Report P-3: Population Projections by Race/Ethnicity, Detailed Age, and Gender, 2010-2060 - July 2021 Archived version (awaiting DOF update)
2020-forwardReport P-3: Population Projections by Race/Ethnicity, Detailed Age, and Gender, 2020-2070 - September 2024http://dof.ca.gov/Forecasting/Demographics/Projections/

Please note: due to rounding the sum of categories may not equal the total.

Cells containing a period (".") represent a value of zero. In cells representing quotients, a period may also indicate the indeterminate form 0/0.