The study entitled Assessment of Contributions of Non-Governmental Organizations (NGOs) in the Management of Public Secondary Schools in Zamfara State, Nigeria has seven objectives, some of which are to assess the roles of the NGOs in the supervision, funding, and staff development in public secondary schools in Zamfara state. Seven research questions were asked in accordance with the objectives and seven null hypotheses were postulated. Some of the hypotheses stated that there is no significant difference in the opinions of principals, teachers, and officials of School-Based Management Committees in the involvement of Non-Governmental organizations in the supervision, and there is no significant difference in the opinions of respondents on the contributions of Non-Governmental Organizations in funding public secondary schools in Zamfara State. The target population for the study comprised 154 principals, 2,728 teachers, and 770 officials of School-Based Management Committees (SBMCs) totalling 3,652 from 154 public senior secondary schools in Zamfara State. The sample size was 15 principals, 262 teachers, and 74 officials of SBMC totalling 351. The study adopted descriptive survey research design and the data-collecting instrument for the study was a researcher-designed questionnaire. The data collected from the study were analysed using descriptive statistics of frequency counts, and simple percentages with the aid of Statistical Package for Social Sciences (SPSS) version 21. The study employed the use of One-way Analysis of Variance (ANOVA) to analyse the data in determining level of significance. The seven null hypotheses for the study were tested at 0.05 level of significance. Five of the hypotheses were accepted (retained) and two other hypotheses were rejected. Findings of the study revealed an overall low level of NGOs' contributions in the management of public secondary schools in Zamfara State, Nigeria. It was recommended that there should be proactive and enhanced contributions from the NGOs in the management of public secondary schools in Zamfara State, Nigeria