Other pages about the topic: Population

American Community Survey

The American Community Survey (ACS) is an ongoing survey of the nation's population that provides detailed demographic, housing, social, and economic data—data that used to be collected via the decennial census long form.

Annexations and municipal boundary changes

Per RCW 35.13.260 and RCW 35A.14.700, jurisdictions must send annexation paperwork to the Office of Financial Management (OFM) within 30 days of the annexation effective date. OFM approval is necessary for a city to qualify for revenues related to population.

April 1 official population estimates

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.

Central Annexation Tracking System

The purpose of this site is to provide a convenient location where federal and state agencies, local governments, organizations, and members of the public can obtain information about annexations. State agencies that use this site include WSDOT Geographic Services, DOR Tax Payer Account Administration, and DOR Property Tax Division.

Posting on this website does not replace reporting to DOR by counties and cities. RCW requirements are still in effect.

Annexations and municipal boundary changes Q&A

Why does my city need Office of Financial Management (OFM) approval for an annexation?

State law, RCW 35.13.260 and RCW 35A.14.700, requires that annexation certificates be approved by OFM before the population and housing in an annexed area can be used for population purposes. All annexations and boundary line adjustments must have a certificate sent to OFM even if there is no population in the area.

Which documents do I need to send to OFM?

1990 Census demographic profiles

These demographic profiles are based on the 1990 Census Summary Tape File (STF) products. Separate profiles are available for general population and housing characteristics, social characteristics, labor force status and employment characteristics, income and poverty status, and housing characteristics. The general population and housing characteristics information is extracted from STF1 (100% count data); the remaining tables are derived from STF3 (sample data).

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