Nickel Belt is an informal nickname for the Sudbury region in Northern Ontario, because of the belt of nickel ore deposits found in the area.

It also serves as the name of one of the two electoral ridings serving the city.

The riding of Nickel Belt was created in 1952 from parts of the ridings of Algoma East, Sudbury, Parry Sound—Muskoka and Nipissing. It has traditionally included much of the Sudbury District and small parts of the Algoma, Nipissing and Timiskaming Districts, along with all but the urban core of Sudbury.

Provincially, the federal riding was split into Nickel Belt and Sudbury East from 1967 to 1999, when the Ontario legislature redesigned its riding boundaries to match the federal ridings.

Members of Parliament for Nickel Belt

• Léoda Gauthier, Liberal (1953 - 1958, Gauthier had previously represented the Sudbury riding)
• Osias Godin, Liberal (1958 - 1965)
• Norman Fawcett, New Democrat (1965 - 1968)
• Gaetan Serré, Liberal (1968 - 1972)
• John Rodriguez, New Democrat (1972 - 1980, first term)
• Judy Erola, Liberal (1980 - 1984)
• John Rodriguez (1984 - 1993, second term)
• Ray Bonin, Liberal (1993 - present)

Members of the Legislative Assembly of Ontario for Nickel Belt

• Rhéal Bélisle, Prog. Cons. (1955-1963)
• Gaston Demers, Prog. Cons. (1963 - 1971)
• Floyd Laughren, New Democrat (1971 - 1998)
• Blain Morin, New Democrat (1998 - 1999)
• Shelley Martel, New Democrat (1999 - present)