Background
Mahoney was born in New York City and educated in the public schools there.
United States representative politician
Mahoney was born in New York City and educated in the public schools there.
He was a Democrat. He engaged in the dry-goods business for several years. Moved to Brooklyn, New York, and engaged in the sale of liquor. He was elected as a Democrat to the Forty-ninth and Fiftieth Congresses (March 4, 1885 - March 3, 1889).
Was not a candidate in 1888 for reelection to the Fifty-first Congress.
Became ill while attending the inauguration ceremonies of President Benjamin Harrison March 4, 1889, and died in Washington, District of Columbia, March 27, 1889 at the age of 40. He is interred in Calvary Cemetery, Long Island City, Queens County, New New York
