Grey Highlands is a municipality in the southeast corner of Grey County, Ontario, Canada that was formed on January 1, 2001, by the amalgamation of the village of Markdale and the townships of Artemesia, Euphrasia and Osprey, which included the unincorporated hamlets of Eugenia Ceylon, Maxwell, Singhampton, Priceville, Kimberley, and Feversham. The former village of Flesherton is also located within the municipality; it was amalgamated with Artemesia Township in 1998.
The dominant natural feature of the area is the Niagara Escarpment, which passes through the municipality and has several ancillary features:
- The Bruce Trail, a popular hiking and multi-use trail, follows the brow of the Niagara Escarpment
- Beaver Valley, a steep-sided and broad valley, was created during the last ice age. The eastern side of the valley, as part of the Niagara Escarpment, was designated a UNESCO Biosphere reserve in 1990. The west side of the valley is home to a number of downhill ski slopes, including Beaver Valley Ski Club
- Eugenia Falls, where the Beaver River crosses the Niagara Escarpment, is the location of Grey County’s only gold rush