66 is a municipal district (MD) in southwest Alberta, Canada.

Containing no urban communities of any kind, its municipal office is in Chain Lakes Provincial Park,[3] approximately 38 km (24 mi) southwest of the Town of Nanton.

Ranchland's rugged foothill terrain is unsuited for the crop agriculture practised elsewhere in Alberta, and ranching remains the single livelihood of its inhabitants.

[5] In the 2021 Census of Population conducted by Statistics Canada, the MD of Ranchland No.

[2] In the 2016 Census of Population conducted by Statistics Canada, the MD of Ranchland No.