Joan (Jo) Melchior van der Mey (19 August 1878, Delfshaven – 6 June 1949, Geulle) was a Dutch architect best known as the originator of the Amsterdam School style of architecture.
Van der Mey was a student of Eduard Cuypers from 1898, won the Dutch Prix de Rome in 1906; he was taken on by the city of Amsterdam as an "Aesthetic Advisor".
Van der Mey's job was to coordinate the extensive symbolic art and sculptural program, inside and outside.
Much of the sculpture is the work of Hildo Krop and H. A. van den Eijnde, but a large group of well-known artists contributed.
Van der Mey also designed bridges and housing complexes in south Amsterdam and around the city's Mercatorplein.