This study was done in Konya and its some small towns (Çumra, Beyşehir, Sarayönü). Sixty sheep fr0m Konya and each smail town were examined monthly between the dates of May, 1994 and May, 1995. The blood samples were taken from each sheep and blood smears were prepared for microscopic examination. In addition. serum sample from each sheep was separated for the serologic diagnosis of B.ovis by ELISA. The sheep were examined for tick infestation, and collected ticks were identified by stereomicroscopy. At the results of microscopic examinations of 723 blood smears, B. ovis was diagnosed in 83 (11.47 %). However, B. ovis antibodies were determined serologically by ELISA in 295 (42.14 %) of 700 serum samples. According to the result of both serologic and microscopic examinations, the seasonal prevalance of babesiosis in sheep was highest in July. When the age pre-valance of B. ovis infestation diagnosed by ELISA and microscopic examinations was evaluated, the highest prevalance (53.9 %) was found at the 1-2 age group. The lowest prevalance (22.14 %) was found in sheep ageing 6-12 months. The results of the collected tick examinations showed that Rh. bursa and Rh. turanicus had the highest prevalance at the dates of between April and August. There was significant differences (p<0.01) between the results of microscopic and serologic examinations.