Southgate Tower is a high-rise office building at 16333 Trenton Road in Southgate, Michigan. Since its completion, it has been the tallest building in the Downriver area of Wayne County, Michigan, as well as the tallest building between Detroit and Toledo, Ohio. A large portion of office space in the building was occupied by PNC Financial Services. Until October 18, 2013, a PNC Bank branch also operated in the building.