John Joseph Delaney (August 21, 1878 – November 18, 1948) was an American lawyer and politician who served ten terms as a United States representative from New York from 1918 to 1919, and then from 1931 to 1948.

He engaged in the diamond business in 1897, was graduated from the Brooklyn Law School of St. Lawrence University in 1914, was admitted to the bar in 1915 and commenced practice in New York City.

He was a delegate to the Democratic State conventions in 1922 and 1924 and was deputy Commissioner of Public Markets of New York City from 1924 to 1931.

He was again elected as a Democrat to the House of Representatives, this time to the Seventy-second Congress, to fill the vacancy caused by the death of Representative-elect Matthew V. O'Malley.

This article incorporates public domain material from DELANEY, John Joseph.