BACKGROUND: Toxocara canis is one of the most frequent small intestinal helminths of dogs with zoonotic importance through which the soil is contaminated with the eggs through the fecal excretion. OBJECTIVES: This study was carried out to determine T. canis infection in dogs and soil of public parks of Piranshahr city using fecal examination. METHODS: In the present study, a total of 150 feces and 150 soil samples were randomly collected from Piranshahr city in the period April 2012 to April 2013. The specimens were subjected for floation using Clayton-lane method. RESULTS: The average rate of infection in examined dogs and soil was respectively 31.3% and 8%. The infection in stray dogs, sheepdogs and watchdogs were respectively 32.14%, 25.7%, 33.89%. The infection had significant difference between age groups of <1 year-old (54.54%) and >1 years-old (22.44%) (p<0.05). The infection rate in male dogs (38.46%) was significantly higher than female dogs (25%) (p<0.05). The highest infection rate was in spring (42.1%) and the least in fall (24.32%) (p<0.05). The average egg number per gram of feces (EPG) and soil were 2195.7±983.7 and 5±3.6, respectively. The EPG had significant difference with examined animals. Of 150 examined soil samples, 12(8%) were positive for eggs of T. canis. The highest infection rate was found to be from soils of slaughterhouse area (16%, EPG 5±3.6) (p<0.05). The highest infection rate was in spring (13.15%) which had significant difference with other seasons (p<0.05). CONCLUSIONS: The results showed that T. canis was parasite in dogs and soil of different areas of Piranshahr city in which it could be of public health concern in the region.