The study examines the effect of self-concept and attitude on the academic performance of senior secondary school students in economics in Mangu Local Government Area, plateau state, Nigeria. The study adopted the simple random sampling technique. The total population of the study was 227 despondences drawn from government owned secondary schools in Mangu local government area of plateau state. Primary data were collected using structured questionnaire that were administered to a sample of 188 which were used for analyses. Four hypotheses were formulated and tested with the used of SSPS, were mean and standard deviation was used to analyze the research question while t test and ANCOVA was used to test the hypothesis at 0.05 level of significance. The result indicated that positive self-concept can have a significant impact on a student academics achievement, motivation and confidence. This implies that students who believes in their capabilities and have a positive self-concept are more likely to succeed and persevere through challenges. The study recommends among others that economics teachers and school administrators should always educate and oriented economics students on the need to have good concept or perceptions toward the course. 

Keywords: Academic Performance, Attitude, Economics, Self-Concept.