Preliminary county data

The Census Bureau has not released all of the data that OFM needs to fully update the Small Area Demographic Estimates (SADE) and related products. OFM used the 2020 Census data released so far to provide preliminary county-level data updates.

Intercensal estimates

Intercensal estimates are estimates that are bracketed on both sides by decennial census or state-certified special census counts. As such, they yield a more consistent series than postcensal estimates which only reference the prior census point. (Last updated March 21, 2024)

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.

1. Adjustment method
2. Table 1 - Adjusted Census 2000 population and housing by type of structure and group quarters for the state, counties, and cities
   • Sample (SF3) housing and population data by type of structure are adjusted to match total housing and population counts in (SF1).