This research work is on Survey of Library Space Allocation in Selected Secondary Schools in Samaru Environs. One of the objectives of the study was to investigate the impact of students' population on allotted school library space in secondary schools in Samaru environs. Survey research design utilized quantitative method to collect data. However, the population of the study included fifteen (15) selected secondary schools comprising of sixty (60) secondary schools' libraries and the librarians or teacher/school librarians both private and government owned establishment in Samaru environs. While the instrument for data collection was structured questionnaire which was subjected to a test of validity by professional librarians and reliability using three (3) teacher/school librarians or assigned person from Barewa College, Gaskiya, Zaria in Kaduna State. The reliability coefficient was found to be 0.76 using Split-Half method. One of the findings revealed that the library space allocated is not commensurate with the total number of students' population. This could be attributed to the fact that the school management lack vision for future growth/development of the school because the there is no room for further expansion due to inadequate land. It was concluded that most school managements do not plan for future growth/development because there is no room for expansion. Among the recommends was that before State Ministry of Education will give approval for the establishment of any school, they should ensure that the proposed school administrator has adequate land mass that will cater for future development of the school in general and the library in particular Keywords: School Library, Library Space Management, Library Space Allocation