The Waccamaw killifish (Fundulus waccamensis) is a species of fish in the family Fundulidae.

[1] Reliable reports of this species' occurrence are from only a single location, Lake Waccamaw and its tributaries, in Columbus County, North Carolina.

While restricted in range, the fish is common there and total population may exceed 1 million.

[1] This species has been recorded in Lake Phelps in Washington County, North Carolina where it was most likely introduced by anglers using it as bait.

[2] While there are no known specific threats to the Waccamaw killifish, it is currently classified as vulnerable by the IUCN because of its restriction to a single location.