Hi Daphne, The Oregon State Archives, arcweb.sos.state.or.us/county/cpmultnomahdescrip.html has marriage records for that county from 1855-1968. Go to that web site and on the left hand column, click on Contact Archives.
If that doesn't work out, contact the Genealogical Forum of Oregon, gfo.org/ .
There are other sources for marriage records. Go to Multnomah County Records Inventory, arcweb.sos.state.or.us/county/cpmult/marriage.html . Successful Searching!