The aim of this study was to determine the prevalence of the feline intestinal helminthes in Sari, northern Iran. From April to October 2004, post-mortem examinations were carried out on 100 stray cats. The gastrointestinal tract was removed, opened up and the mucosa examined microscopically for mature and immature worms. Overall, 90% of cats were infected with a high prevalence of Ancylostoma tubaeforme (64%). In relation to sex, the differences were not significant. Infection with multiple parasite species (53%) was more common than infection with only one species of parasite (37%). There was significant difference in the prevalence of infection between adult and juvenile cats (p < 0.05). From the veterinary and medical points of view, stray cats represent potential reservoirs of disease. Children especially may be at great risk, since they are more likely to come in closer contact with cats and with contaminated soil when playing with the cats and in the garden. Both animal and human health education are recommended in these communities.