Some evidence shows that educational leaders have become more aware and knowledgeable of school counseling programs since the ASCA National Model was released more than 20 years ago. However, such research is based on self-reported perceptions and experiences. This study aimed to develop an inventory to objectively assess the level of knowledge about comprehensive school counseling programs among educational leaders. After developing the Educational Leaders' Knowledge of School Counseling Inventory (ELKSCI), we collected validity and reliability data among school counseling experts and leaders.