References concerning the diseases and parasites of ptarmigan are widely dispersed in the literature, and for the most part are not readily accessible. It is the purpose of this paper to report the helminth parasites obtained from 191 willow ptarmigan, Lagopus lagopus (Linn.); 45 rock ptarmigan, L. mutus (Mont.); and 56 white-tailed ptarmigan, L. leucurus (Rich.). These birds were collected over a period of four years, and were taken from widely separated areas in Alaska.