Sudbury electoral district was created in 1947 from part of the
Nipissing riding. It consisted initially of the city of Sudbury and a part of the territorial district of Sudbury. In 1952, the boundaries were narrowed significantly to include only the city of Sudbury, the
geographic township of McKim and the town of
Copper Cliff. The rest of the original Sudbury riding was incorporated into the new riding of
Nickel Belt. In 1976, Sudbury's growth in population led the riding to shrink further. It now included only the northern half of the city; the city's southern half was incorporated into Nickel Belt. In 1996, it was redefined as the part of the City of Sudbury north of a line drawn from east to west along Highway 69, south along Long Lake Road, and west along the north boundary of the geographic Township of Broder. In 2003, the riding expanded geographically to include the former town of
Walden, now part of the city of Greater Sudbury. The remainder of the city continues to be part of the Nickel Belt riding. This riding was left unchanged after the
2012 electoral redistribution. Following the
2022 Canadian federal electoral redistribution, the riding will gain
Nickel Centre,
Wanup and the remainder of the former city of
Sudbury from
Nickel Belt, and will loses all of its territory west of
Highway 144 to the new riding of
Sudbury East—Manitoulin—Nickel Belt. These changes will come into effect upon the calling of the
2025 Canadian federal election. == Demographics ==