Background: Currently contraceptive use is lower among young women in Ethiopia. Accordingrnto EDHS2011 report out of sexually active 5% of all women age 15-19 and 7% of age 20-24rnreported current use of any contraceptive method. Currently there is a growing interest inrnadolescent reproductive health because teen age pregnancy in particular is associated with highrnmaternal, fetal and neonatal problems which makes it is an important public health issuerninternationally and nationally. There is growing evidence that teen age girls who get pregnant arernlikely to drop out of school and if become teen age parents are likely to face social and economicrnproblems. There is a low rate of use of sexual reproductive health service in the study area.rnObjective: To assess the level of awareness, attitude of contraceptives and utilization of familyrnplanning services among female youth students and barriers that hinders effective use of thernservices.rnMethod: Institutional based cross sectional study was conducted in Oromia regional state Arsirnzone Assella town, Assella preparatory school. Systematic random sampling was used to selectrnstudy subjects for survey while purposive sampling was used to select study subjects forrnqualitative study. A pre-tested structured questionnaire was used to collect quantitative data andrninterviewer topic guide was used for qualitative. The survey data was entered in to Epi, Infornversion 3.5.4 and exported, cleaned and analyzed using SPSS version 21. Factors associated withrnutilization of family planning were identified using logistic regression and content analysis ofrnqualitative datarnResult: Of 296 female youth students 288(97.3%) have heard about contraceptive methods. Thernfirst common source of information about family planning was mass-media180 (62.5%) and thernleast source of information (8.3%) was internet. Out of sexually active respondents, (61%) withrn(95%CI 55.5-66.5) currently using a contraceptive methods. Those who reside in urban and thosernwho were satisfied with family planning service were found to use contraceptive AOR=4.60,rn95%CI 1.06-19.96 and AOR=9.75, 95%CI1.62-58.71respectively.rnConclusion: Relationship with parents in terms of sexual health among female youth were low ,rnfamily life education program in school and elsewhere should provide female youth withrnessential information how to guide them and refrain from unnecessary sexual practice ,STI andrnHIV/AIDS.