In Albany, Yih volunteered at her children's school, eventually running for the local school board. She started service on the Clover Ridge Elementary School board in 1969, moving to the Albany Union High School board in 1975. In 1976, the local Democratic Party chairperson asked Yih to run for the Oregon State House. Yih won the election, defeating a Republican opponent who had 14 years of incumbency. Yih took office in 1977. She went on to serve three two-year terms in the House.