Henry Carmer Wetmore (August 6, 1823 New York City – January 28, 1862 Philadelphia, Pennsylvania) was an American writer and politician from New York.
About 1851, he removed to Fishkill, New York, and engaged in literary pursuits.
William G. Mandeville had been elected to this seat in 1857 for a two-year term (1858–1859).
Mandeville was appointed as Postmaster of Stuyvesant Falls, New York in June 1858.
Postal Department but, before his commission could have been issued, declined to take the office, too late realising that the acceptance of this appointment would vacate his Senate seat.