William Henry Grey (December 22, 1829, in Washington, D.C. – November 8, 1888, in Helena, Arkansas) was a state legislator, storeowner and church leader in Arkansas. He served in various elected and public offices in the state during the Reconstruction era. The Encyclopedia of Arkansas History and Culture calls Grey "a tireless fighter for the rights of freedmen." In 1868 he was among the first six African Americans who served in the Arkansas House. His gravesite in Magnolia Cemetery was listed on the National Register of Historic Places in 2019.