Demodicosis is one of the most common diseases in dogs. We have analyzed the epizootological features of the course of demodectic invasion in dogs. In the process of research, territorial, age, breed, sex, seasonal features of the distribution of canine demodicosis, clinical forms of its manifestation were studied. When making a diagnosis, the generally accepted laboratory diagnostic method was used. In the conditions of the Kamenetz-Podolsk region, the share of demodicosis of all pathologies of the skin of dogs is 24.6%. Clinically, 69.9% of the animals had local demodicosis, and its most common forms were scaly (35.4%), mixed (21.2%) and pustular (18.6%). The highest morbidity rate was observed in female short-haired breeds (Bulldog, Rottweiler and Pug) at the age of 7-12 months, there were two peaks in the incidence of dogs in March - 31.1% and in October-November (37.8-34.1%).