: Tick-borne rickettsioses are caused by obligate intracellular bacteria belonging to the spotted fever group (SFG) of the genus Rickettsia within the family Rickettsiaceae in the order Rickettsiales16. Goal: of this survey is to define prevalence of rickettsia and define clinical symptoms in Mongolia. Materials and Methods: We used achieve data of National center for Zoonotic disease 2005-2016. All data were entered into SPSS-17 program and analyzed related frequency, distribution, and mean level. Result: According to transmitter tick type, prevalence of tick is increasing by year. Around 70 percent of tick borne diseases were tick borne rickettsia. It registered in 118 soums of 20 provinces and 9 districts of Ulaanbaatar. Most cases registered in Govi-Altai and Arkhangai and in April to May. After tick attack of 1-3 days, fever, rash, headache, enlarged gland symptoms are presented mostly. in recent year, cases of tick borne rickettsia is increasing associated with climate change, density of tick and country location. Main clinical symptoms were high temperature (67.0%), strong headache (33.9%), to get break out (33.9%) and enlarging lymph (29.0%). Those symptoms were varied by age difference. Conclusion Tick borne rickettsioses registered in 118 soums of 20 provinces and 9 districts of Ulaanbaatar city and high prevalence observed in Gobi-Altai and Arkhangai aimags. TBR more registered in April and May and TBR patients were women-herders and children under 9 year old. Mostly, 1-3 days after of tick bite, some clinical symptoms such as fever, rash on the skin, headache, relieved the primary anti-inflammatory properties and enlarged lymphatic glands were detected. In recent year, cases of tick borne rickettsia are increasing in association with climate change and density of tick in country location and its needed broad and depth study on dynamics of TBR in various climate regions in Mongolia.