Susan McLain is an American politician. A Democrat, she currently serves as a member of the Oregon House of Representatives from District 29, representing Cornelius, Forest Grove, and parts of Hillsboro. She served as a councilor for Metro, the regional government covering the urban portions of Clackamas, Multnomah, and Washington counties, for 16 years, first winning election in 1990. She was an unsuccessful candidate for Washington County commissioner in 2006. She was elected to the Oregon House of Representatives in 2014, defeating Republican Mark Richman.