Frank Henderson (December 6, 1922 – April 27, 2015) was a Republican Idaho State Representative from 2012 to 2014 representing District 3 in the B seat. He previously served in District 5 Seat B from 2004 to 2012. Henderson was the mayor of Post Falls, Idaho from 1980 to 1983 and Kootenai County commissioner from 1983 to 1991.