(1859-1936) a U.S. Representative was born in Lewiston on August 27, 1859. He attended the common schools and was graduated from Bowdoin College in 1881, studied law, was admitted to the bar in 1883 and commenced practice in Lewiston.
A member of the Maine House of Representatives in 1884 and 1885, McGillicuddy was mayor of Lewiston in 1887, 1890, and 1902. He was a delegate at large from Maine to the Democratic National Conventions in 1892, 1904, 1912, and 1920.
An unsuccessful candidate for election in 1906 to the Sixtieth Congress and in 1908 to the Sixty-first Congress, he was elected as a Democrat to the Sixty-second, Sixty-third, and Sixty-fourth Congresses (March 4, 1911-March 3, 1917).
McGillicuddy was an unsuccessful candidate for reelection in 1916 to the Sixty-fifth Congress and for election in 1918 to the Sixty-sixth Congress. He was a member of the Democratic National Committee 1917-1932 and continued the practice of law in Lewiston until his death in that city on July 30, 1936, with interment in Mount Hope Cemetery.