Diane Harkey is an American politician and businesswoman known for her work in California. She served as a member of the California State Assembly from 2014 to 2018, representing the 73rd district. Harkey has also held positions on various boards, including the California Board of Equalization, where she focused on tax policy and fiscal issues. In 2018, Harkey ran for the U.S. House of Representatives in California's 49th congressional district but was unsuccessful. She is affiliated with the Republican Party and has been involved in local politics and community service throughout her career.