John Joseph Fitzgerald (March 10, 1872 – May 13, 1952) was an American lawyer and politician who served nine terms as a United States Representative from New York from 1899 to 1917.
Fitzgerald was elected as a Democrat to the Fifty-Sixth and to the nine succeeding Congresses and held office from March 4, 1899, to December 31, 1917, when he resigned to resume the practice of law.
In March 1932 he was appointed county judge of Kings County; he was elected in November 1932 and served until his retirement on December 31, 1942. He resumed the private practice of law and in 1952 died in Brooklyn; interment was in St. John's Cemetery, Middle Village, Queens.