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As required by the Oregon Administrative Rules, all city annexations that result in a change of population must be certified by the Population Research Center (PRC). In practice, the certification for populations of less than 125 housing units involves a count of housing units and people that is conducted by city officials and reviewed by PRC staff. If the annexation is large and involves more than 125 housing units, city officials should contact PRC as soon as possible. The Population Research Center welcomes the opportunity to work with city officials so that the annexation certification can be accomplished promptly.

The count of people in a large annexation can be conducted through either enumeration or special survey. Although the city is responsible for costs of the enumeration or survey, PRC staff will work with city officials to design a count that is as cost-effective as possible.

In a recent large annexation, Bend city officials and PRC staff worked together to design a cost-effective count of all housing units in the annexed area. This resulted in the prompt certification of more than 13,000 people in the newly-annexed area. Because of effective planning and enumeration, the annexation was certified to Oregon's Secretary of State on the very date of annexation, resulting in immediate payment of tax revenues for the City of Bend.

If you wish to request an enumeration, conducted on an at-cost basis, please contact us.

The Population Research Center is open 9:00 a.m. to 5:00 p.m. Monday through Friday and is located in Room 780 of the Urban Center, 506 SW Mill St. The mailing address is 
Population Research Center
Portland State University 
PO Box 751
Portland, Oregon 97207-0751

phone: 503-725-3922
fax: 503-725-5199