The purpose of this study was to investigate the professional development needs of assistant principals in the northern Kentucky region in preparation for the launch of the Northern Kentucky Assistant Principals' Network, a unique and innovative program to support their leadership development. Using the Educational Leadership Policy Standards: ISLLC 2008 as the framework for our study, survey data revealed professional development needs in all standards. Findings from the open-­ended question revealed professional development needs in specific areas such as school finance/budgeting, time management/work-life balance, school culture, instructional leadership, and special education. This paper is intended to help guide the work of professors of educational leadership and those charged with supporting the ongoing development of assistant principals.