Other pages about the topic: Forecasting & Research

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).

Census 2010

OFM data products

To access a variety of 2010 Census data products specific to Washington state, please follow the link below.

Historical estimates of April 1 population and housing for the state, counties, and cities

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.

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