Alcadia jamaicensis is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae.
(Original description in Latin) The shell is very similar to Alcadia aurantia <small>(J. E. Gray, 1824)</small>, but is more conical and thinner. The peristome is paler and less thickened. The edge of the aperture is thinner.
This species occurs in Jamaica.