The Regional Municipality of Sudbury was a Regional Municipality that existed in Ontario, Canada, from 1973 to 2000, and was primarily centred on the city of Sudbury. It served as an upper-tier level of municipal government, aggregating municipal services on a region-wide basis like the Counties and Regional Municipalities of Southern Ontario, and was the only upper-tier municipal government ever created in Northern Ontario. The Regional Municipality was dissolved with the creation of the amalgamated City of Greater Sudbury on January 1, 2001.