The District Municipality of Muskoka, more generally referred to as the District of Muskoka or Muskoka, is a regional municipality in Central Ontario, Canada. It extends from Georgian Bay in the west, to the northern tip of Lake Couchiching in the south, to the western border of Algonquin Provincial Park in the east. A two-hour drive north of Toronto, it spans 6,475 km2 (2,500 sq mi). It has some 1,600 lakes, making it a popular cottaging destination.

Central Ontario is a secondary region of Southern Ontario in the Canadian province of Ontario that lies between Georgian Bay and the eastern end of Lake Ontario.