William J. McCoy (August 14, 1942 – November 12, 2019) was an American farmer and Democratic politician from Rienzi, Mississippi.

McCoy was born August 14, 1942, in Booneville, attended Northeast Mississippi Junior College, and graduated from Mississippi State University.

He has worked as a vocational agriculture teacher and as a loan officer for the Farmers Home Administration, as well as a school auditor for the Mississippi State Department of Audit.

[3] On May 25, 2011, McCoy announced that he would not seek re-election to the State House.

[2] He served as a member of the Board of Trustees of Northeast Mississippi Community College.