Virginia, the Commonwealth of Virginia, often referring to its government.
Australia, the Commonwealth of Australia, often referring to its federal government.
The Commonwealth of England, which existed from 1649 to 1660, under Cromwell.
The Commonwealth of Nations, a loose confederation of nations based around the former British Empire.
Kentucky, the Commonwealth of Kentucky, often referring to its government.
Massachusetts, the Commonwealth of Massachusetts, often referring to its government.
Pennsylvania, the Commonwealth of Pennsylvania, often referring to its government.
An unincorporated community in Lee County, Virginia.
An unincorporated community in Cascade County, Montana.
An unincorporated community in Kanawha County, West Virginia.
A hamlet in Lethbridge County, Alberta.
An unincorporated community near Monarch Pass, Chaffee County, Colorado.
An unincorporated community in Sheridan County, Wyoming.
Two other peaks with the affix "mountain": Monarch Mountain (Alberta) and Monarch Mountain (British Columbia).
A surname.
The Monarch, a mountain in British Columbia.