There are at least nine named lakes and reservoirs in Petroleum County, Montana, United States.

Lakes Little Bear Lake, , el. Wild Horse Lake, , el.

Reservoirs Headman-Field Reservoir, , el. Petrolia Lake, , el. Prtrolla Lake, , el. War Horse Lake, , el. War Horse Lake, , el. War Horse Lake, , el. Yellow Water Reservoir, , el.

See also List of lakes in Montana

Notes