The purpose of this study is to examine the correlates of effective instructional supervision in secondary schools in Bayelsa State. A critical examination of all the policies and personnel put in place by the government to achieve the aim of supervision of instruction in secondary school in Bayelsa State were elucidated. The study involved empirical design with the stratified population of fifteen (15) secondary schools, comprising three hundred (300) teachers and sixty (60) supervisors (Principals) randomly selected from three geo-political zones (Sub divided into: Riverine, Upland and Midland). The research instrument used for the study was rating scale consisting of five (3) research questions. The analysis involved the use of mean and standard deviation, why the hypotheses were analyzed using Z-test at 0.05 level of significance. The results of the analysis indicated that: demography, status/personality and perceptions are not a major factor that influences supervision of instruction in schools, but quality and number of teachers, incentives and motivation, quality and number of supervisors, and school location are the correlates factors that influence supervision of instruction in schools. Conclusively, the researcher recommends that supervision is very important for effective instruction in secondary schools and that government should provide all it takes to motivate teachers as to enhance regulation of supervision of instruction.