The main aim of the present study was to explore the effect of family relationship, academic climate and SES on academic achievement and personality of high school students. Adolescent period is a crucial factor in building the personality and preparation for great kind of achievement. Family and school environment strongly affect it. Hence it was hypothesized that family relationship academic climate and, SES will significantly affect academic achievement and personality of high school students. 180 students of Sangli and Kolhapur district were selected by random sampling method 2x2x3 factorial research design was employed. Three way ANOVA was used to analyze the data. The findings of the study revealed that these three variables strongly and significantly affect academic achievement and personality of high school students most important finding of this study is that middle class family emerged as a most significant group when Scheffe's post-hoc comparison test was used.