Oenopota excurvata is a species of sea snail, a marine gastropod mollusk in the family Mangeliidae.
The length of the shell attains 10 mm, its diameter 3.8 mm. The characteristics are similar to Curtitoma trevelliana<small> (Turton, 1834)</small> except for the white color, being shorter and the margins of the whorls being more curved.
This species occurs from the Bering Sea to the Salish Sea, North America