RCW 43.62.030 states that the Office of Financial Management 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, 2025

• Press release [PDF] - includes tables and maps showing pop. change and density by county, and top 25 cities by pop. change
• April 1, 2025 population of cities, towns, and counties used for the allocation of selected state revenues [PDF] | Excel version
• Population change and rank [Excel]
• Components of change
• Housing units [Excel]
• Historical estimates of population and housing
• Technical information

April 1, 2024 data product

• Population trends [PDF]

2020 Census data releases

• Redistricting data (Public Law 94-171)