Michael John Garvin, also known as Michael J. Garvin and M. J. Garvin (1861–1918), was an American architect from The Bronx, New York. A graduate of Manhattan College, he served as the first Building Commissioner of the borough (1897–1903) and its first Under Sheriff. With the placement of the influential IRT Third Avenue Elevated train, Garvin was immersed in designing many surrounding structures during the borough's increasing growth at the turn of the 20th century. Of his architectural contributions the Haffen Building; the ; and the Bronx Borough Courthouse have all become New York City landmarks while the latter a US National Historic Place.