Katcho Achadjian (June 2, 1951 – March 5, 2020) was an Armenian-American businessman and politician. He was a Republican. He served as a member of the California State Assembly from 2010 to 2016. He was also a member of the San Luis Obispo County board of supervisors from 1998 to 2010. In 2016, he ran for the United States House of Representatives from the 24th district but was defeated in the primary election.