John P. Lomenzo (August 12, 1915 – June 7, 2004, Rochester, Monroe County, New York) was an American lawyer and politician.
He was a judge of the Monroe County Court when he was the Republican candidate for New York State Comptroller in 1962.
He was defeated by the incumbent Democrat Arthur Levitt Sr., but was appointed Secretary of State of New York by Governor Nelson A. Rockefeller on August 22, 1963, and stayed in office until he resigned in December 1973 and was replaced by Governor Malcolm Wilson after Rockefeller's resignation.
He was a partner in the law firm of Field, Lomenzo & Turret.
His son John P. Lomenzo Jr., has been Town Court Justice of Penfield, New York since 1995.