The main aim of this study was to investigate the effect of family socio-economic status on students' academic Achievement. Descriptive survey research design was employed. The target population was students from the College of Education and Behavioural Sciences. 172 students were taken from the target population through stratified random sampling. The results showed us that first, family income did not bring anything new to students' academic Achievement; second, there was statistically significant negative relationship between sex and students' academic achievement; finally, family education level contributed 40.96% (R[superscript 2]*100%) to students' academic achievement whereas 59.04% (1-R[superscript 2])*100%) were unexplained variables that contributed to students' academic achievement. It was recommended that families should access education to encourage their children in schools. Moreover, socioeconomic policies should be formulated to enable children from low economic status to have equal opportunity as children from high economic parents to maintain the harmony among children in the nation.