Previous studies tend to have assessed principals' demographic variables, but with other dependent variables such as administrative effectiveness, job performance, students' achievement and so on. From the literature, principals' demographic qualities and the misuse of material, capital appears to have been under-assessed. This study used a quantitative approach to investigate some demographic attributes of principals and the misuse of school material capital in secondary schools. Using a questionnaire in Cross River State, Nigeria, data were gathered from a total of 667 secondary school administrators. Findings revealed significant differences in the misuse of school material capital by principals of different age, professional qualification and years of experience; although major disparities between male and female principals were not identified. More specifically, principals who were older, seasoned, and who possessed Bachelors and Masters of Education degrees were efficient managers of school material capital. A high rate of misuse was found among principals who were younger and inexperienced than their counterparts who were young, inexperienced, and possessed the post-graduate diploma in education, as well as, other professional academic qualifications unrelated to the field of education (e.g., HND, BSc., B.A and MSc.). Based on these findings, key implications were discussed for quality service delivery and administrative effectiveness.