Twenty-three new locality records are presented for nine species of butterflies (Lepidoptera) from 11 islands and island groups in the eastern Caroline Islands, Micronesia. None is endemic; most occur widely in the Indo-Australian region and the islands of the western Pacific. The Lycaenidae were the most well-represented family with at least eight species. The nymphalid Hypolimnas bolina was the most frequently encountered species, occurring on all 11 island groups. Pakin Atoll, which was visited on two different occasions for a total of 5 days, was the only island group visited during this study where butterflies were not seen.