Sion Harris (1811 – April 25, 1854) was an American-born Liberian colonist and politician. An emancipated slave, he emigrated to Liberia in 1830 and engaged in a string of adventures, most notably thwarting an attack on the Heddington mission by an army of Loma tribesmen in 1840. He later served in Liberia's House of Representatives.Harris was born in Knox County, Tennessee, in 1811.