Modbury North is a suburb 14 km northeast of Adelaide, capital city of South Australia. Modbury North is a suburb in the City of Tea Tree Gully Council area. The suburb is bounded by Milne Road in the north, Golden Grove Road in the east and Montague Road in the south. The suburb's western boundary runs parallel with, but midway between, Kelly Roa…Modbury North is a suburb 14 km northeast of Adelaide, capital city of South Australia. Modbury North is a suburb in the City of Tea Tree Gully Council area. The suburb is bounded by Milne Road in the north, Golden Grove Road in the east and Montague Road in the south. The suburb's western boundary runs parallel with, but midway between, Kelly Road and Nelson Road.