There are at least 15 named lakes and reservoirs in Prairie County, Montana.
- Airport Reservoir. 46°38′46″N 105°00′33″W / 46.64611°N 105.00917°W / 46.64611; -105.00917 (Airport Reservoir), el. 2,582 feet (787 m)[1]
- Archdale Reservoir. 46°34′30″N 104°55′09″W / 46.57500°N 104.91917°W / 46.57500; -104.91917 (Archdale Reservoir), el. 2,562 feet (781 m)[2]
- Ban Reservoir Number 1. 47°01′39″N 105°34′14″W / 47.02750°N 105.57056°W / 47.02750; -105.57056 (Ban Reservoir Number 1), el. 2,854 feet (870 m)[3]
- Clark Reservoir. 46°53′16″N 105°42′11″W / 46.88778°N 105.70306°W / 46.88778; -105.70306 (Clark Reservoir), el. 2,818 feet (859 m)[4]
- Coal Creek Reservoir. 46°50′45″N 105°13′49″W / 46.84583°N 105.23028°W / 46.84583; -105.23028 (Coal Creek Reservoir), el. 2,297 feet (700 m)[5]
- Grant Reservoir. 46°52′22″N 105°38′46″W / 46.87278°N 105.64611°W / 46.87278; -105.64611 (Grant Reservoir), el. 2,723 feet (830 m)[6]
- Homestead Reservoir. 46°59′23″N 105°33′33″W / 46.98972°N 105.55917°W / 46.98972; -105.55917 (Homestead Reservoir), el. 2,759 feet (841 m)[7]
- Horse Reservoir. 46°34′17″N 104°57′12″W / 46.57139°N 104.95333°W / 46.57139; -104.95333 (Horse Reservoir), el. 2,743 feet (836 m)[8]
- Hunter Creek Reservoir. 46°45′07″N 105°35′47″W / 46.75194°N 105.59639°W / 46.75194; -105.59639 (Hunter Creek Reservoir), el. 2,467 feet (752 m)[9]
- Innes Reservoir. 46°56′24″N 105°24′12″W / 46.94000°N 105.40333°W / 46.94000; -105.40333 (Innes Reservoir), el. 2,589 feet (789 m)[10]
- Little Garrison Reservoir. 46°51′34″N 104°36′59″W / 46.85944°N 104.61639°W / 46.85944; -104.61639 (Little Garrison Reservoir), el. 2,346 feet (715 m)[11]
- McClure Reservoir. 46°52′18″N 105°30′42″W / 46.87167°N 105.51167°W / 46.87167; -105.51167 (McClure Reservoir), el. 2,575 feet (785 m)[12]
- Papps Reservoir. 46°56′24″N 105°29′29″W / 46.94000°N 105.49139°W / 46.94000; -105.49139 (Papps Reservoir), el. 2,651 feet (808 m)[13]
- Silvertip Reservoir. 46°52′09″N 105°35′29″W / 46.86917°N 105.59139°W / 46.86917; -105.59139 (Silvertip Reservoir), el. 2,664 feet (812 m)[14]
- South Fork Reservoir. 46°52′57″N 105°40′16″W / 46.88250°N 105.67111°W / 46.88250; -105.67111 (South Fork Reservoir), el. 2,759 feet (841 m)[15]
- ^ "Airport Reservoir". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
- ^ "Archdale Reservoir". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
- ^ "Ban Reservoir Number 1". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
- ^ "Clark Reservoir". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
- ^ "Coal Creek Reservoir". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
- ^ "Grant Reservoir". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
- ^ "Homestead Reservoir". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
- ^ "Horse Reservoir". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
- ^ "Hunter Creek Reservoir". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
- ^ "Innes Reservoir". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
- ^ "Little Garrison Reservoir". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
- ^ "McClure Reservoir". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
- ^ "Papps Reservoir". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
- ^ "Silvertip Reservoir". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
- ^ "South Fork Reservoir". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.