Born: June 3, 1822, Hartford, Connecticut.
Died: August 27, 1902, New York City.
Buried: Cedar Hill Cemetery, Hartford, Connecticut.
Thomas was the son of Thomas Hopkins Gallaudet (1787–1851) and Sophia Fowler. He is often confused with his father, who co-founded the first American school for the deaf.
He was ordained to the diaconate June 16, 1850, and became an Episcopal priest in 1851. Among his achievements was the founding of St. Ann’s Church for Deaf Mutes in New York City in 1852, which in effect launched the Episcopal mission to the deaf. He also founded the Gallaudet Home for Deaf-Mutes, near Poughkeepsie, New York, in 1885.