The study explored the relationship between managerial competency of school heads and teaching productivity of teachers in public secondary schools of Panabo City Division. Also, it investigated the association of the involved variables and the domains of managerial competency of school heads that significantly influence teaching productivity of teachers. With the use of probability sampling, 166 public Grade 10 teachers were selected as the respondents. Utilizing the descriptive-correlational survey method, the data collated were analyzed through the use of Mean, Product-Moment correlation and Regression Analysis. Results revealed that there was a high managerial competency of school heads and a high teaching productivity of teachers. Furthermore, there was a significant relationship between managerial competency of school heads and teaching productivity Moreover, all domains of managerial competency of school heads, strategic thinking and innovation competency, instructional leadership competency, personal excellence competency, stakeholder engagement competency, and managerial leadership competency, were found to have significantly influence the teaching productivity of teachers. Based on the findings, it was further suggested that higher officials in the Department of Education may identify means on how to further increase the managerial competency of school heads which would heighten the teaching productivity of teachers. More so, future researchers may further explore the involved variables considering other factors and research methods.