William John Gies

William John Gies (February 21, 1872 - May 20, 1956) was a US biochemist and dentist.

Gies was born in Reisterstown. He made bachelor of science at Gettysburg College in 1893 and Ph.D. at Yale University in 1897.

In 1989 he started teaching at Columbia university. He co-founded the School of Dentistry at Columbia, leading to the creation of the American Association of Dental Schools.