Sussex Drive, also known as Ottawa Regional Road 93, is an arterial road in Ottawa, Ontario, the capital of Canada. It is one of the city's main ceremonial and institutional routes. Travelling roughly parallel to the Ottawa River, Sussex Drive begins as a continuation of Sir George-Étienne Cartier Parkway at Rideau Gate, at the entrance to Rideau Hall. It travels south to Rideau Street, with the portion south of St. Patrick Street forming the northbound half of a one-way pair with Mackenzie Avenue. Both Mackenzie Avenue and Sussex Drive connect with Colonel By Drive at their southern end, which continues south alongside the Rideau Canal.

Rideau Hall is the official residence in Ottawa of both the governor general of Canada and the Canadian monarch. It stands in Canada's capital on a 36-hectare (88-acre) estate at 1 Sussex Drive, with the main building consisting of approximately 175 rooms across 9,500 square metres (102,000 sq ft), and 27 outbuildings around the grounds. Rideau Hall's site lies outside the centre of Ottawa. It is one of two official vice-regal residences maintained by the federal Crown, the other being the Citadelle of Quebec.