Sampson Pond is a 302-acre, enlarged Great Pond with an average depth of eight feet and a maximum depth of 16 feet. The water is slightly stained with a transparency of 12 feet. The bottom is composed of sand and gravel. Emergent vegetation covers about a tenth of the surface area. The shoreline (3.4 miles) is lightly developed with year-round homes and cranberry bogs. The pond is fed by cranberry bog drainage and Tillson Brook and drains into Sampsons Brook at the south end. The pond was a natural pond that had been enlarged to its present size by a dam built for a foundry.

Access is provided by a town-managed paved ramp off Main Street suitable for trailered boats. Although there is no launching fee, fishermen will need to purchase a privilege sticker from the town to park on the town land next to the ramp. The town of Carver also has a town beach on the south end of the pond where cartop boats can be launched. Boaters should be aware of numerous dangerous boulders in the shallow areas of the pond.