The Old South Suburb is an historic suburb of Halifax and proposed Heritage Conservation District. It is located in downtown Halifax, Nova Scotia, uphill from waterfront lands along Lower Water Street, overlooking Halifax Harbour to the east. The Heritage Conservation District encompasses historic residential buildings extending south along Hollis Street from the historic Black Binney House to the Atlantic Superstore, south of Cornwallis Park. It includes the Via Rail Station and Westin Nova Scotian Hotel around Cornwallis Park as well as properties further south, along Barrington Street. From Green Street the district extends north, along Barrington Street, to Bishop Street. All streets in the historic suburb run on a grid with two north-south streets intersected by seven east-west streets.