John Joseph Boylan (September 20, 1878 – October 5, 1938) was an American politician who served eight terms as a Democratic member of the United States House of Representatives from New York from 1923 until his death in 1938.

He attended the public schools, Cathedral School, De La Salle Institute, and Manhattan College.

Boylan was employed as a postal clerk and afterward engaged in the real estate business.

He was elected as a Democrat to the 68th, 69th, 70th, 71st, 72nd, 73rd, 74th and 75th United States Congresses, holding office from March 4, 1923 until his death on October 5, 1938, in New York City.

Boylan died on October 5, 1938, in French Hospital in Manhattan; and was buried at the Calvary Cemetery in Queens.