GTA municipalities are:

  • Town of Ajax
  • Town of Aurora
  • City of Brampton
  • Township of Brock
  • City of Burlington
  • Town of Caledon
  • Municipality of Clarington
  • Durham Region
  • Town of East Gwillimbury
  • Town of Georgina
  • Halton Region
  • Town of Halton Hills
  • Township of King
  • City of Markham
  • City of Mississauga
  • Town of Milton
  • Town of Newmarket
  • Town of Oakville
  • City of Oshawa
  • Peel Region
  • City of Pickering
  • Town of Richmond Hill
  • Township of Scugog
  • City of Toronto
  • Township of Uxbridge
  • York Region
  • City of Vaughan
  • Town of Whitchurch-Stouffville
  • Town of Whitby

Note: The GTA is NOT a municipality, or political boundary, the GTA is a provincial planning or business area and the municipalities that are included in it can vary depending on who is using the term.