Lampsilis radiata, also known as the eastern lampmussel, is a species of freshwater mussel in the family Unionidae.

[3] The eastern lampmussel is native to the Atlantic Coastline of North America, from Nova Scotia to South Carolina.

[1][4] In lakes, it is found in the littoral zone, exposed to waves, and below 30 ft (9.1 m), in sandy and muddy pools.

[2] It favors cool and warm temperatures, with the freshwater pearl mussel being more common in cold waters.

The mussel is at risk of being extirpated in states south of New York due to a small population caused by lesser habitat suitability.