The study examined teacher’s utilization in Ondo State Public Junior Secondary Schools (JSS) in Nigeria with particular reference to Ondo State from 2006/07 to 2009/2010 academic session with a view to appraising whether all these secondary schools teaching personnel were effectively utilized in their respective schools. The research design was a descriptive survey of ex post facto study. From the existing six states in the south western part of Nigeria, Ondo state was purposively sampled while proportional sampling method was used to select 136 public secondary schools. A researcher designed and validated instrument tagged ‘Teachers’ Utilization Questionnaire in Public Junior Secondary Schools in Ondo State (TUQPJSS) was used to collect relevant data. Test – retest method was used to obtain the reliability of the instrument and the coefficient reliability of 0.81 was obtained. Three research questions and one hypothesis were raised to guide the study. Finding revealed yearly average full time equivalent teacher pupil ratio of 1:72 as well as significant difference in teacher utilization rate in urban centre compared with their counterpart in the rural centres as at the period of study. Based on the finding, it was recommended that more teachers should be employed and evenly distributed to make teachers’ utilization more effective in the state public secondary schools. Some planning implications were stressed in the paper.