The features of babesiosis in dogs of Kirov Region were studied. Dynamics of babesiosis in dogs were analyzed based on annual reports and own monthly microscopic examinations. Diagnosis of babesiosis was made according to the results of microscopy of blood smears stained according Romanowsky method. The identification of tick species was performed according to their morphological features. The highest infection rate in dogs was registered in 2007 (66, 67 %), the lowest – in 2010 (19,7 %). The Babesia infection was significantly higher in animals living in Kirov and its suburbs. Dog babesiosis is a seasonal affective disease which has two peaks. The maximum peak was registered from the beginning of May until the middle of June (8,20 and 7,05 %), and the less pronounced peak – in September (3,44 %). The discovered ticks were differentiated as Ixodes ricinus.