Abstract: This study on the constraints to effective management of secondary school libraries was carried out using the survey method. Questionnaire was used to collect required data and simple tables and percentages were used to analyze the data collected. During the course of the study, it was identified that inadequate funding by the government is the major constraints to effective management of school libraries. Data gathered also showed that the area mostly affected by this constraint is in provision of library/information resources. The libraries under study have been coping with these constraints through alternative funding. However, the researcher made some recommendations which include among which are adequate funding by government.