Thomas A. Ledwith (February 14, 1840 in New York City – April 1, 1898 in New York City) was an American lawyer and politician from New York.
He graduated from St. Francis Xavier College in 1856. Then he studied law, was admitted to the bar in 1861, and practiced in New York City.
He was a member of the New York State Assembly (New York Co., 11th D.) in 1863. He was elected a New York City Police Justice (8th D.) in 1863, and re-elected in 1869. In 1870, he ran for Mayor of New York City but was defeated by Tammany man A. Oakey Hall. In 1871, he ran unsuccessfully for the New York Supreme Court (1st D.).
He was a member of the New York State Senate (7th D.) in 1874 and 1875.
He married Agnes McGowan (March 1, 1843 New York City, August 6, 1868 New York City) on April 11, 1866. They had one son, Joseph Ledwith (June 26, 1868 New York City, December 27, 1929 Bethel, Connecticut). He married Lucy A.Donahue (November, 1853 New York City, January 28, 1941, New York City) and they had three children, Thomas Augustine, Mary and Frances.
He died at his home, at 28 West 72nd Street in New York City, and was buried at the Calvary Cemetery in Woodside, Queens.