: this study uses types of schools to investigate students’ academic self-concept in sokoto state secondary schools. the study employed the descriptive survey design. the population of the study comprises 139 senior secondary schools with 65,927 total numbers of students, from which 382 was determined as a sample size, using the research advisors (2006) which was selected through multi-stage sampling procedure. the instrument used was the adapted academic self-concept scale with 38 items. the researcher used both descriptive and independent t-test to analyze the data. the study revealed that: (i) sokoto state secondary schools students have moderate level of academic selfconcept (ii) there is no significance difference between academic self-concept of day and boarding students (iii) there is no significant difference in students’ academic self-concept between mixed and single sex secondary schools in sokoto state(iv) there is no significant difference in student’s academic self-concept between boys’ and girls’ secondary schools in sokoto state. the study recommends among other that government should launch some special programmes intended to increase students’ level of academic self-concept because it is the crucial part of the educational adjustments. key words: students’ academic self-concept, secondary schools, mixed and single sex schools, day and boarding schools.