The domestic chicken, Gallus gallus domesticus Linnaeus, 1758, is an important component of theagribusiness segment, and Brazil is one of the world's largest broiler producers and exporters. The present study aimed to characterize the composition and structure of the helminth community of backyard chickens, G. g. domesticus, in Seropédica, Rio de Janeiro, Brazil. Fifty-five adult chickens were studied. The overall helminth species richness was 12. The nematodes Capillaria sp. And Heterakis gallinarum (Schrank, 1788), recovered from small intestine and cecum, respectively, presented the highest prevalence and mean abundance. In addition, these species presented the highest values of frequency of dominance. The helminth species Amoebotaenia cuneata (von Linstow, 1872) – Raillietina tetragona (Molin, 1958); and Davainea proglottina (Davaine, 1860) – A. cuneata; and H. gallinarum – Ca...