A coprologic study was conducted to determine the prevalence of helminth infections at the Samsun Zoo, Turkey. There are 184 animals comprising 45 species or subspecies, including 23 ruminants, three equines, 21 carnivores, 10 rabbits, two primates, two kangaroos, and 123 birds in the zoo. Fecal samples of zoo animals were collected and examined four times from 2006 to 2007: in September, December, March, and June. In four seasons, coprologic analysis revealed that 123 of 338 (36.4%) fecal samples were infected with different helminths types, including one trematode, one cestode, and 12 nematodes eggs or larvae. Species included Dicrocoelium spp. (0.9%), Moniezia spp. (1.1%), Toxascaris leonina (7.1%), Toxocara spp. (8.6%), Uncinaria stenocephala (1.4%), Dictyocaulus filaria (1.9%), Muellerius spp. (14.1%), strongyle type (20.7%), Strongylus edentatus (8.3%), Cyathostomum spp. (66.7%), Trichuris spp. (3.9%), capillarid type (9.5%), Ascaridia spp. (1.9%), and Heterakis spp. (12%).