Charles Albert Boynton (November 26, 1867 – October 12, 1954) was a United States federal judge.
Born in Quebec, Canada, Boynton received a B.B.S. from Glasgow Normal University, Kentucky in 1888 and an LL.B. from the University of Michigan in 1891. He was in private practice in Waco, Texas from 1891 to 1907. He was the United States Attorney for the Western District of Texas from 1907 to 1912, and then returned to private practice in Waco until 1924.
On December 16, 1924, Boynton was nominated by President Calvin Coolidge to a seat on the United States District Court for the Western District of Texas vacated by William R. Smith. Boynton was confirmed by the United States Senate on December 17, 1924, and received his commission the same day. He assumed senior status on May 1, 1947, serving in that capacity until his death, in 1954, in Dallas, Texas.