This study was design to address the relationship between duration in prison and some components of psychological well-being (i.e. self-awareness, stress and stress coping) among prisoners in Hosanna town correctional center. To meet this objective, the researcher drew 70 out of 2000 populations who were pursuing their life in 2012 E.C was selected as the sample participants of the study by using systematic random sampling technique by making use of random numbers. The reason why the researcher uses this technique is, in order to give equal chance to the targeted population and to avoid research bias. A point Likert type scale questionnaire was used to address the relationship between duration in prison and some components of psychological well-being. The basic research questions of this paper was first, what are the relationship between the year of stay in prison and the levels of self-awareness, stress and stress coping among prisoners second, is there a gender difference on self- awareness, stress and stress coping among prisoners third, are there relationship between prisoner's psychological well-being and their age. The data were analyzed through percentage, correlation; T-test and ANOVA. The result reveled that there is no significant relationship between some components of psychological well-being (i.e. self- awareness, stress and stress coping) and age among prisoners. The study also revealed that there is significant difference between male and female prisoners on the components of psychological well-beings (i.e. self-awareness, stress and stress coping). As well as it shows significance relationship between duration of stay in prison and the components of psychological well-being (i.e. self-awareness, stress and stress coping) among the prisoners of Hosanna town. The study suggested that it is advisable to create favorable conditions for the prisoner to develop a sense of good interaction when he/she is in the prison or/and after return to the society and they should be done by practicing different physical exercise going in concordance with flexible plane of schedules. Finally, the correctional center should develop sense of belongings and coordination among offender to minimize stress and conflict in the correctional center.