The purpose (objective) of this study was to examine the stream choice and perfo rmance of fe lllalernstudents in preparatory schools of East Wallaga Zone Oromia region. To achieve iii is objec tivernda ta were collected from 201 felllale stu de nts and 74 teacher respondents using instrulllen is sllchrnas questionnaire, interuiew alld doclllllellts analysis. The data obtained were all(llyzed ill lerllls ofrnpercentage. Data f rom interuiew II/ere II llalyzed using narration . Findings revealed Ihat fel/lII lernstuden ts' stream choice was Iligllly il1jlllell ced by peer group advice, family expectation (speciallyrnmothers) and the individu al ill teres 1 offemale studenls themselves, which had happened ll'ililOlltrnhauing enough info rmatioll aboul the slrelllllS. There was relative increment of social sciencernfenwle students in the last four years wllereas, their achievement was lower than nalurnl sciell cernstream students. Potential fac tors for female students' low performance IPere female studellts' lessrneffort in studying, low confidence, lack of parental financial support, mothers poor educationalrnback ground and parents' low expectatiOlls about female students academic perfonllllllce.rnGenerally female students' streanl choice seems that had happened IPithout having betterrnknowledge about the streams and because of the pressure from peer group and family. Thisrnmanifested itself in academic peljorlllance of female students' of social science stream Ihanrnnatural science in their 1,1 Sel1les ter grade twelve 2007/8 E.e. Examination result. For femalernstudents' stream choice, giving detailed orien tation about each stream and l1laking them free fromrnexternal pressure, and to allain this, strellgthening guidance and counseling sen/ices byrnprofeSSional counselors are suggested. Woreda Education office and preparatory schools shouldrnjointly work to change fam ily alii tude in order to invest material and finan ce for the successfulrnachievement of female students and be convinced that female students can exert equal efforts asrnmales in education are suggested.