John Coolidge (September 7, 1906 – May 31, 2000)[1] was an American executive, businessman, and entrepreneur with the New York, New Haven and Hartford Railroad.

In his autobiography, Calvin Coolidge recorded his impressions of the birth of his first son: "The fragrance of the clematis which covered the bay window filled the room like a benediction where the mother lay with her baby.

"[3] On July 7, 1924, his younger brother, Calvin Jr., died from blood poisoning due to a blister on his foot.

He was reportedly a charming and excited talker who would still answer visitors' questions about his father or his family, and who would, on occasion, give a rare personal interview.

His earliest American ancestor, John Coolidge, emigrated from Cottenham, Cambridgeshire, England, around 1630 and settled in Watertown, Massachusetts.