Old Ottawa South is an older urban neighbourhood in Capital Ward in Ottawa, Canada. Old Ottawa South is a relatively small and compact neighbourhood, located between the Rideau Canal (to the north) and the Rideau River (to the south). The eastern boundary is Avenue Road. Bronson Avenue forms the western border of the residential neighbourhood. Carleton University is on the other (western) side of Bronson but the campus can be considered to be geographically within Old Ottawa South as the campus is also nestled between the river and the canal.