Fourth Lake (Nova Scotia) could mean the following :

• Fourth Lake Flowage located at 44°21′44″N 65°41′44″W / 44.36222°N 65.69556°W / 44.36222; -65.69556 (Fourth Lake Flowage)

• Fourth Lake located at 45°0′58″N 62°24′30″W / 45.01611°N 62.40833°W / 45.01611; -62.40833 (Fourth Lake)
• Fourth Lake located at 44°58′0″N 62°20′40″W / 44.96667°N 62.34444°W / 44.96667; -62.34444 (Fourth Lake)
• Fourth Lake located at 44°53′11″N 62°42′8″W / 44.88639°N 62.70222°W / 44.88639; -62.70222 (Fourth Lake)
• Fourth Lake located at 44°30′38″N 63°55′5″W / 44.51056°N 63.91806°W / 44.51056; -63.91806 (Fourth Lake)
• Fourth Lake located at 44°30′45″N 63°43′25″W / 44.51250°N 63.72361°W / 44.51250; -63.72361 (Fourth Lake)

• Fourth Lake located at 45°9′32″N 61°56′5″W / 45.15889°N 61.93472°W / 45.15889; -61.93472 (Fourth Lake)
• Fourth Lake located at 45°8′32″N 61°56′30″W / 45.14222°N 61.94167°W / 45.14222; -61.94167 (Fourth Lake)

• Geographical Names Board of Canada
• Nova Scotia Placenames