Hi, Not all of the marriage records have been loaded into the Washington State Digital Archives. I'd contact the Whatcom County Auditor, www.co.whatcom.wa.us/auditor/index.jspor firstname.lastname@example.org .
Ask them too if divorce records are filed with the County Clerk and their contact info.
If you run into difficulty, you can ask the Whatcom Genealogy Society, http://theusgenweb.org/wa/whatcom/WGS/wgs.htmhttp://theusgenweb.org/wa/whatcom/WGS/wgs.htm to do the research. There probably be a fee for this. Successful Searching & Happy New Year!