This study was designed to determine the level of professional competence of principals in District IV in the Division of Manila. Results of the assessment of the supervisors, principals and teachers were gathered, and analyzed to determine the significant difference on the level of professional competence of principals. The descriptive method was used. Eleven public schools in Manila were included using the convenience and total enumeration sampling design. The researcher used standard survey questionnaire derived from Alberta Professional Practice Competencies for School Leaders validated by two experts in school administration and management. Unstructured interview was also used to gather the additional needed data. The data gathered were statistically treated using the weighted mean, percentage, f-test and Yates correction formula. The level of professional competence of principals was evaluated in terms of seven key areas namely fostering effective relationships, embodying visionary leadership, leading a learning community, providing instructional leadership, developing and facilitating leadership, managing school operations and resources and understanding and responding to the larger societal context. It was found out that the principals were rated “very effective” in all seven areas of professional competence based on the assessment of the three groups of respondents. There was a significant difference of the responses of the three groups while there is no significant relationship of the principals’ profile to their level of professional competence. At the end, an action plan was deduced and made based from the findings to improve the areas of professional competence that need to be improved by the principals.