These are available at the Oregon State Archives. You can write to each county clerk for information. State Records of Births and Deaths Statewide registration of births and deaths began in 1903. The original birth and death records are only available from the state. Oregon State Health Division Vital Statistics Section P.O. Box 14050 Portland, OR 97214 State records are not open to the public.
Birth records are available only to the registrant's immediate family.
In your request, state your relationship to the individual you want information about and your reason. The Oregon State Archives has an index to the state's records of births and deaths from 1903 to 1984. Delayed registration of births began in the late 1930s. To obtain these records write to the Oregon State Health Division. Marriage and Divorce Records Counties began to record marriages soon after they were organized.