Charles Atwater (January 2, 1815 – December 6, 1891) was an American Senator from Connecticut, graduated from Yale College.
After graduation, he spent a year in the Princeton Theological Seminary, but in 1835 he became a member of a firm of wholesale grocers in Philadelphia, where he married Mary, daughter of Joseph Montgomery, on Sept. 26, 1836.
He was for many years extensively engaged in the wholesale iron and hardware business, and was prominent in many public interests in New Haven.
His interest in the Birmingham Iron and Steel Works led him to be an active promoter of the New Haven and Derby Railroad, of which he was long the Treasurer.
The youngest daughter is the wife of David Daggett and the younger son was graduated at Yale's Sheffield Scientific School in 1879.