Thirteen coyotes (Canis latrans) collected from Nueces County, Texas, harbored the following helminths: Filaroides osleri, Dirofilaria immitis, Physalaptera sp., Alaria americana, Ancylostoma caninum and Taenia sp. Aortic aneurysms were present in nine of ten adult coyotes (90%) while Spirocerca lupi was found on or in the wall of the thoracic esophagus of only three adult coyotes (30%). Oocysts of Isospora rivolta were found in the feces from one of two coyotes examined.