Introduction: There were estimated 37.9 million people living with HIV at the end of 2018 worldwide 1.7 million people newly infected one. Low HIV risk perception and low sexual health knowledge is the main means for increasing HIV infections among young people. According to Ethiopia the spectrum estimates and projections of HIV prevalence in 2019 at national and Amhara region was 1.13% and 1.4%, respectively. Adiarkay district is one of the hotspot area regarding HIV, preparatory students living in this area highly susceptible to contract HIV /AIDS. Therefore, this study determine prevalence of HIV risk perception and associate factors among preparatory school students in Adiarkay district. Objectives: To assess HIV risk perception and associated factors among preparatory school students in Adirkay district north Gondar North West Ethiopia 2020G.C. Methods: Institution based cross sectional study was conducted from February to March, 2020 among Adiarkay preparatory school students. A total of 634 were included in to the study using a stratified sampling technique. Data were collected by using self-administered questionnaire. Descriptive statistics, including frequencies and proportions were used to summarize the study. Binary logistic regressions were used to identify associated factors of HIV risk perception at significance level of p-value < 0.05 for multi variable factor analysis. Results: HIV risk perception was found to be 23%. HIV risk perception was higher among students who had more than one sexual partner (AOR = 3.51, 95%CI: 2.10, 5.86), who had peer pressure (AOR = 2.75, 95%CI: 1.72, 2.93), sexual practice (AOR = 7.54, 95%CI: 3.75, 18.35), and age at first sexual intercourse above 18 years (AOR = 1.14, 95%CI: 1.02, 2.04). Conclusion:, HIV risk perception of HIV/AIDS among students in was low. Therefore, it is very crucial emphasizing on teaching and counselling students on the importance of minimizing the number of sexual partners, strength peer education and sexual health education in curriculum. Keywords: Students, HIV risk perception, Adirkay district, Ethiopia