Frank P. Treanor (May 11, 1855 in New York City – August 9, 1933 in Monument Beach, Barnstable County, Massachusetts) was an American businessman and politician from New York.
In 1882, he became a partner in his older brother's bluestone business in Hastings-on-Hudson.
He was a member of the New York State Senate (11th D.) in 1882 and 1883.
He was a business partner of William H. Clark who built the Empire Race Track, and was Superintendent of the track at the time of Clark's death.
Treanor died on August 9, 1933, during a summer vacation at Monument Beach, Massachusetts.