This eastern Ontario riding contains part of the amalgamated city of Ottawa. The riding includes the former city of Nepean, the former Rideau township and the former Osgoode township.
It runs from Boundary Road in the east to Eagleson Road in the west, between Highway 417, the CN Rail line, Limebank Road, Leitrim Road and Hunt Club Road in the north and the Rideau River, Belmeade Road and Marionville Road in the south.
The riding of Nepean-Carleton was created in the 1976 redistribution from the former Grenville-Carleton riding. It was renamed Nepean in 1986. In 1996, it was combined with part of Carleton-Gloucester and Lanark-Carleton and became Nepean-Carleton again. In 2004, the riding lines were redrawn to take in part of eastern Ottawa, up to Highway 417.
Population: 133,245 (2006 census; an increase of 21.9% since 2001)