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 (Turton, 1834) 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, Northwest America