Walter C. Root (December 8, 1859 - June 26, 1925) was an American architect practicing in Kansas City, Missouri.

He had two siblings including his older brother, John Wellborn Root.

During the American Civil War Sidney Root supported secession.

Root's role in aiding the confederacy severely damaged his property interests, and after the war the family relocated to New York City, where Walter Clarke was educated.

[1] In 1879 he moved to Chicago and joined his brother's office, Burnham & Root.