Trøjborg is a neighborhood in the city of Aarhus, Denmark in Skt. Johannes parish with about 11,000 residents in 2015. The neighborhood is part of the district Midtbyen (English: City center) and borders the neighborhoods Nørre Stenbro to the South West, Risskov to the North and Riis Skov and the Bay of Aarhus to the East.