Introduction: Dogs represent a potential public health risk because of the natural transmission of zoonotic parasitic infections. Objective: We estimated the frequency and determined factors associated with the presence of intestinal nematode eggs in dog feces collected in public parks in Merida, Mexico. Materials and methods: A total of 100 fecal samples of dogs collected from 20 public parks in two areas of the city of Merida were analyzed. The samples were processed by the centrifugation-flotation and the McMaster techniques to confirm the presence and quantify the excretion of intestinal nematode eggs per gram of feces. The factors associated with the presence of nematode eggs were identified using the univariate analysis X 2 . Results: A frequency of 11 % of fecal samples positive to IN eggs was found. Eggs of three species of parasites were identified. Ancylostoma caninum was the most common (10 %), followed by Toxocara canis (10 %) and Trichuris vulpis (1 %). Most of the positive samples were infected with only one IN (10 %) and only 1 % was positive to mixed infection by A. caninum and T. vulpis . The presence of stray dogs in public parks was an associated factor (P= 0.046) with the highest number of positive fecal samples to intestinal nematode eggs. Conclusions: It is concluded that in parks of Merida, Mexico, dog feces have high frequency of intestinal nematode with zoonotic potential; the parks with access to stray dogs were the most likely to be positive.