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Overview of California's County Population Estimating Methods
Overview of California's County Population Estimating Methods
Introduction
In the 1990s California has estimated county population proportions twice yearly, using three of four methods at each estimate date (January 1 and July 1). All estimates are benchmarked on 1990 decennial census counts. The unweighted algebraic mean of the three estimated distributions is calculated to produce a final proportionate distribution that is applied to the independently estimated state control to derive a final set of population estimates for the state’s 58 counties. Multiple methods are used to estimate change in county population, because no one method for estimating postcensal county population has shown itself superior in terms of consistency, acceptable accuracy and minimum bias, taking into account methods’ requirements of data type, availability, coverage and timeliness.
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Page Last Revised - October 8, 2021
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