Charles Wesley Leffingwell (December 5, 1840 – 1928) was an author, educator, and Episcopal priest born in Ellington, Connecticut. He was a descendant of Thomas Leffingwell, known as one of the founders of Norwich, Connecticut.
He studied at Union College in Schenectady, New York, and Knox College in Galesburg, Illinois, where he was a member of Beta Theta Pi. He later studied at Nashotah House Theological Seminary before ordination to the diaconate (1867) and priesthood (1868). In 1868, he founded St. Mary's School in Knoxville at the invitation of Henry John Whitehouse.
Leffingwell was editor of The Living Church magazine from 1880 to 1900.