William Copeland Wallace (May 21, 1856 – September 4, 1901) was a U.S. Representative from New York.

Born in Brooklyn, New York, Wallace graduated from Adelphi Academy, Brooklyn, New York, in 1873, from Wesleyan University, Middletown, Connecticut, in 1876, and from the law department of Columbia College (now Columbia University), New York City, in 1878.

He was appointed judge advocate general on the staff of Governor Morton in 1894.

He died at his summer home in Warwick, New York, September 4, 1901.

This article incorporates public domain material from the Biographical Directory of the United States Congress