The study investigated the effects of socio-economic background of senior secondary school students on their academic performance in Adavi LGA of Kogi state. Survey and ex-post facto research design work was used to collect data on student socio-economic background and their academic performance respectively. The population of the study comprises of out-going senior secondary school students of the selected school and their parent’s socio-economic status. Stratified random technique was used to select the secondary schools and the students for the study. Simple percentage was used to analyse the research hypothesis. Conclusion drawn from the analyses indicates that parent socio-economic status influenced the academic performance of the students. Recommendation was made based on the findings. Such as: parents with high socio economic status to assist schools in area of educational developments. Government should introduce scholarship scheme to assist less privilege students, basic and social amenities to be provided in all public schools by the government to ensure that standard are maintained.