This is a list of neighbourhoods in the urban core of Greater Sudbury, Ontario. This list includes only those neighbourhoods that fall within the pre-2001 city limits of Sudbury — for communities within the former suburban municipalities, see the articles Capreol, Nickel Centre, Onaping Falls, Rayside-Balfour, Valley East and Walden.

Walden was a town in the Canadian province of Ontario, which existed from 1973 to 2000. Created as part of the Regional Municipality of Sudbury when regional government was introduced, the town was dissolved when the city of Greater Sudbury was incorporated on January 1, 2001. The name Walden continues to be informally used to designate the area.