Island Pond is a census-designated place (CDP) in the town of Brighton in Essex County, Vermont, United States. The population was 821 at the 2010 census. It is part of the Berlin, NH–VT Micropolitan Statistical Area.
Island Pond is in the center of the town of Brighton, at the north end (outlet) of Island Pond, the lake. Vermont Routes 114 and 105 pass through the community, joining as Derby Street leading south out of the center of the CDP. Route 114 leaves north from Island Pond as Railroad Street, leading 16 miles (26 km) to the Canada–United States border at Norton; to the south Route 114 leads 24 miles (39 km) to Lyndonville. Route 105 leaves east as East Brighton Road, leading 16 miles (26 km) to Bloomfield on the Connecticut River; to the southwest it follows Derby Street and Route 114 for 2 miles (3 km), then turns northwest and leads 17 miles (27 km) through Charleston to Derby Center.
According to the United States Census Bureau, the Island Pond CDP has a total area of 4.6 square miles (11.8 km2), of which 4.2 square miles (10.8 km2) is land and 0.39 square miles (1.0 km2), or 8.42%, is water.
Bluff Mountain overlooks the lake and the island from the north.
The Clyde River flows west out of Island Pond after which the community is named. The Abenaki called this water Menanbawk (literally, "island pond"). It was renamed "Knowlton Pond" in tribute to Luke Knowlton, the surveyor who helped lay out the town in the 1780s.