Regional Municipality of Hamilton–Wentworth

Regional Municipality of Hamilton–Wentworth
Municipal Boundaries of the former Regional Municipality of Hamilton–Wentworth.
CountryCanada
ProvinceOntario
RegionGolden Horseshoe
Created1974
Dissolved2001
Area
  Total
1,118.31 km2 (431.78 sq mi)
Population
 (1996)
  Total
467,799
Time zoneUTC−05:00 (EST)
  Summer (DST)UTC−04:00 (DST)
Area code(s)905, 289, and 365
SeatHamilton
MunicipalitiesCity of Hamilton
Town of Stoney Creek
Town of Ancaster
Township of Flamborough
Town of Dundas
Township of Glanbrook

The Regional Municipality of Hamilton–Wentworth was an upper-tier regional municipality in Ontario, Canada, that existed between January 1, 1974, and January 1, 2001. It was composed of six municipalities, centered on and including the City of Hamilton, and existed to coordinate certain shared services, such as policing and public transit, for those municipalities. It was created through the restructuring of Wentworth County, and was one of the last such governments to be created in Ontario.

The regional municipality was dissolved in 2001, and its constituent municipalities were amalgamated to form the current single-tier City of Hamilton, with a 2021 total population of 569,353.