Seasonal prevalence and abundance of helminth species in an introduced population (Oahu, Hawaii) of the brown anole Anolis sagrei were examined. One species of Cestoda Oochoristica sp., four species of Nematoda Atractis scelopori, Physaloptera squamatae, Physocephalus sp. (larvae) and larval Acuariidae, one species of Acanthocephala Acanthocephalus bufonis and one species of Pentastomida Raillietiella frenatus were found. Seasonal prevalence of Atractis scelopori is correlated with the seasonal reproductive cycle of Anolis sagrei with highest prevalence found during periods of maximum reproductive activity.