Seth Williams (disambiguation)

Seth Williams may refer to:


 * Seth Williams (1822–1866), American military officer
 * Seth Williams (USMC) (1880–1963), American military officer who served as Quartermaster General of the U.S. Marine Corps
 * Seth Williams (defensive back) (born 1986), American football defensive back
 * Seth Williams (wide receiver) (born 2000), American football wide receiver
 * R. Seth Williams (born 1967), Philadelphia District Attorney