The non-marine molluscs of Pitcairn Islands are a part of the molluscan fauna of the Pitcairn Islands. * Pitcairn Island: 24 species of land snails and one semi-terrestrial gastropod * Henderson Island: 16 species (7 families) of land snails and two semi-terrestrial molluscs * Ducie Island: less than six species of land snails * Oeno Island: less than six species of land snails There is a high degree of endemism of these species.