Annexation and Census

ADVISORY NOTICE: Under the statutes RCW 35.13.260 and RCW 35A.14.700 the count of population and housing in annexations shall be made in "accordance with practices and policies, and subject to the approval of The Office of Financial Management (OFM)." Therefore, when contracting for these services, local jurisdictions should ensure that the consultant, by contract, is required to follow OFM's guidance and that their work be acceptable to OFM who must approve the results. Failure to follow the proper process could result in cities having to recount the annexed population and housing, costing additional funds.

Information about certifying annexations, annexation forms, census requirements and information about April 1 estimates. See also Population Estimates: Process, Methods, and Accuracy.

  1. Annexations Ranked By Size January 1990 - May 2002 Excel
  2. Annexation Certification Process PDF
  3. Quarterly Annexation Reports
  4. Other Annexation Reports
  5. Annexation and Census Forms/Manuals
  6. Municipal Research and Services Center of Washington (MRSC) - Annexation Manual
  7. Annexation Database - Annexations are by OFM approval date
    • January 1, 2000 to March 31, 2008 Excel - Updated 05/07/2008
    • January 1, 1990 to December 31, 1999 Excel
    • January 1, 1980 to December 31, 1989 Excel
  8. City Codes Excel

Last modified: May 07, 2008
E-mail: OFM.Forecasting@ofm.wa.gov