This data release includes metadata and tabular data documenting the reproductive demography of the Samoan swallowtail butterfly (Papilio godeffroyi), including rates of parasitism by two species of Ooencyrtus wasp. Data was collected at approximately monthly surveys of marked host trees (Micromelum minutum) at eight forest stands, mostly in or adjacent to the National Park of American Samoa (NPSA), Tutuila Island, during 2013-2014. One stand was located near the western tip of Tutuila, outside NPSA. Data sets document: (1) sampling effort for swallowtail specimens during monthly surveys of host trees; (2) final life cycle stage achieved by swallowtail specimens brought into the laboratory for rearing or postmortem examination; (3) diameters of swallowtail eggs and eggshells (hatched, fragmentary, or damaged eggs); (4) developmental rates of swallowtail eggs, larvae, and pupae brought into the laboratory for rearing; and (5) evidence of Ooencyrtus wasp parasitism of swallowtail eggshells brought into the laboratory for postmortem examination and number and sex of Ooencyrtus wasps emerging from intact swallowtail eggs that were reared in the laboratory.