Oliver Cromwell Comstock (March 1, 1780 – January 11, 1860) was a United States representative from New York.

He was born on March 1, 1780, in Warwick, Rhode Island, he moved with his parents to Schenectady, New York, when he was a child.

He was not a candidate for renomination in 1818, and was the first judge of court of common pleas for Tompkins County in 1817 and 1818.

He was elected Chaplain of the House of Representatives on December 20, 1836, and served until March 3, 1837.

Comstock died in Marshall, Calhoun County, Michigan, in 1860; interment was in Oakridge Cemetery.