Ludington married Constance Guyot Cameron in 1922; they had three daughters and a son. Their first child was Ethel Saltus, born at Ardmore on May 21, 1923. Their second child was Anne Finley, born at Ardmore on September 26, 1925. Their third child was Constance Cameron, born September 1, 1931. Their fourth child was Charles Townsend Ludington Junior. Ludington was affiliated with the
Merion Cricket Club, Racquet Club of Washington, Yale University Club, Santa Barbara Yacht Club, Bayside Yacht Club, Delaware River Yacht Club, Philadelphia Yacht Club, and the
Aero Club of Pennsylvania. He was a Republican and a member of the
Bryn Mawr Presbyterian Church. == Later life and death ==