Mulgrave-et-Derry, is a village north of Mayo, in the Papineau Regional County Municipality, Quebec, Canada.

Community buildings include the Hill and Gully Riders Snowmobile Club, St. Matthew's Evangelical Lutheran Church, and Our Lady of Light Roman Catholic Church (now Our Lady of Light Cultural Centre).

The Wallingford-Back mine, once one of Canada's largest sources of quartz, is located in Mulgrave-et-Derry.

It became a tourist destination after ceasing operations in the 1970s, but also became unsafe; in 2017, it was barricaded.

This Quebec location article is a stub.