William Gray Evans (December 16, 1855 – October 21, 1924) was the oldest son of Colorado's second territorial governor, John Evans and Margaret Gray Evans. He was president of the Denver Tramway Company. He oversaw the completion of the Moffat Tunnel and worked for four years on the City Beautiful project of Mayor Robert Walter Speer. He owned the Byers-Evans House, now the Byers-Evans House Museum, which is listed on the National Register of Historic Places.