Directories of heads of households have been published for major cities in Oregon.
City Directories for cities in Oregon, held by the Library of Congress at: www.loc.gov/rr/microform/uscity/or.html
For example, the Family History Library has Portland directories for:
•1863-1935 Family History Library films 1377327
•1923, 1941, etc. Family History Library book 979.549/P1 E4p
Portland Directory, 1890-91 at: http://www.familyhistory.com/db.asp?dbid=4448
Oregon City Directory: http://distantcousin.com/Directories/OR/