Sierra Bibijagua are marmoreal elevations located on northern Isla de la Juventud (Island of Youth), southwestern Cuba. Isla de la Juventud is the largest island (2,200 km2) of the Canarreos Archipelago, Greater Antilles. A checklist of terrestrial molluscs recorded from Sierra Bibijagua is presented, including the following information: synonymy, type locality, updated distribution, endemism, and photographs of shells and living individuals whenever possible. The checklist comprises 12 families and 16 genera currently known from the area, including six new records: Farcimen procer, Leidyula floridana, Liguus fasciatus, Subulina octona, Glandinella poeyana, and Bradybaena similaris. [ABSTRACT FROM AUTHOR]