Big Molly Upsim Lake is a lake in Canada. It is located in the province of Nova Scotia, in the southeastern part of the country, 800 km east of the capital Ottawa. Big Molly Upsim Lake is 186 meters above sea level. The area is 5.2 square kilometers. It stretches 5.8 kilometers in the north–south direction, and 3.5 kilometers in the east–west direction.