RCW 43.62.030 states that the Office of Financial Management (OFM) shall annually determine the April 1 populations of all cities and towns of the state.  OFM population estimates for cities and towns are used in state program administration and in the allocation of selected state revenues (RCW 43.62.020).  Population estimates for counties are used to allocate revenues as specified in RCW 36.13.100 and RCW 43.62.030.

If you represent a city or town and need information about the April 1 population estimates program or how to connect to the Population Estimate System (PES), see April 1 population estimates program information.

April 1, 2021 (revised November 30, 2021)

Due to the delayed release of the 2020 Census P.L. 94-171 Redistricting Data, OFM revised its April 1, 2021 estimates. The estimates released on June 30, 2021, are superseded by the estimates released on November 30, 2021.

• April 1, 2021 population of cities, towns, and counties used for the allocation of selected state revenues PDF | Excel
• Population change and rank (Excel doc)
• Components of change  (updated with intercensal estimates on February 10, 2022)
• Housing units (Excel doc)
• Historical estimates of population and housing
• Technical information
• Population Trends (PDF)

2020 Census data releases

• Redistricting data (Public Law 94-171)

Superseded 2021 estimates as released on June 30, 2021

• April 1, 2021 superseded zip file