The main purpose of this study was to examine the impact of adolescents’ perceived parentingrnstyles and some selected demographic factors on the self-regulation of Amanuel secondary andrnpreparatory school adolescent students. The data related to the demographic characteristics,rnperceived parenting styles, and adolescent self-regulation were collected through self-reportrnmeasures from a total of 349 (164 females and 185 males) adolescent students selected viarnstratified and simple random sampling techniques from all grade levels of the school.rnDescriptive statistics, one sample t-test, independent samples t-test, one way ANOVA, andrnPearson product moment coefficient were used to analyze the data that were collected fromrnsamples of the study. The results revealed that family structure and perceived parenting stylernsignificantly affected Amanuel secondary and preparatory school adolescent students’ selfregulation.rnHence, adolescents who were from intact families had significantly higher selfregulationrnthan those who were from non-intact families. In addition, adolescents who perceivedrntheir parents as authoritative had significantly higher self-regulation score than those whornperceived their parents as authoritarian and neglectful. Sex, age, and parental education ofrnparticipant adolescents did not significantly affect their self-regulation. The finding alsornindicated that there were statistically significant positive correlations between parentalrndimensions (parental responsiveness and parental demandingness) and adolescents’ selfregulation.rnOne can conclude that adolescent students of Machakel woreda had significant lowerrnscore of self-regulation; and parenting styles and structures of their families had significantlyrnaffected their level of self-regulation. Finally, recommendations were forwarded based on thernfindings of the present study.rnKey words: Adolescents, Family structure, Parental dimension, Parenting style, Self-regulation