The federal riding was created as "Carleton—Gloucester" in 1987 from parts of
Nepean—Carleton and
Ottawa—Carleton ridings. It consisted initially of • the City of Gloucester, excluding these parts: • bounded on the north by the City of Ottawa, and on the east, south and west by a line drawn from the boundary south along Conroy Road, west along Davidson Road and Lester Road, south along Albion Road, west along the road allowance between lots 10 and 11, Concession 3, south along the Canadian Pacific Railway line, west along Leitrim Road, north along Limebank Road and River Road to the Ottawa city limit; • bounded on the west by the Gloucester city limit, and on the north, east and south by a line drawn east from the limit near Blair Road, south along Blair Road, west along Innes Road, and south along a hydroelectric transmission line situated east of Meadowvale Lane to the western city limit; • the southeast part of the City of Ottawa lying south of Walkley Road and east of Conroy Road; • the townships of Osgoode and Rideau; • the northwest part of the Township of Cumberland lying north of Innes Road and west of Regional Road 57 and Trim Road. In 1996, it was renamed "Gloucester—Carleton", and defined to consist of • the City of Gloucester, excluding • the part bounded on the north by the City of Ottawa, and on the east, south and west by a line drawn from the border south along Conroy Road, west along Davidson Road and Lester Road, south along the Canadian Pacific Railway, west along Leitrim Road, and north along Limebank Road to the City of Ottawa; • the part bounded on the west by the western city limit, and on the north, east and south by a line drawn from the city limit near Mowat Road east to Blair Road, south along Blair Road, west along Innes Road, and south along the transmission line situated east of Meadowvale Lane to the western city limit. • the part bounded on the north by the Quebec border, and on the west by the western city limit, and on the north, east and south by a line drawn from the city limit east along Montreal Road and Highway 17, north along Green's Creek and due north to the Quebec boundary. • the part of the Township of Cumberland west of Trim Road and north of Innes Road. The name of the electoral district was changed in 1997 back to "Carleton—Gloucester", and in 2000 to "Ottawa—Orléans". Following the
2012 redistribution of Canada's ridings, the riding lost the neighbourhood of
Beacon Hill South from
Ottawa—Vanier, and gained the
Cardinal Creek area from
Glengarry—Prescott—Russell and the rural area surrounding
Carlsbad Spring from parts of Glengarry—Prescott—Russell and
Nepean—Carleton. Following the
2022 Canadian federal electoral redistribution, the riding lost
Blackburn Hamlet to
Ottawa—Vanier—Gloucester. This change came into effect upon the calling of the
2025 Canadian federal election. ==Riding associations==