The purpose of this study was to investigate the leadership practices of Catholic elementary school principals. This study sought out to determine: 1) the most prevalent leadership style among Catholic elementary school principals, 2) the relationship between the mission and vision of the school principal, 3) how principals create, maintain, and further the school's Catholic identity, and 4) how principals create a culture of academic success at their school site. A mixed-methods approach was implemented utilizing a total of 35 Catholic elementary school principals within the Archdiocese of Los Angeles (2012) who completed a survey composed of closed and open-ended questions. Of the 35 principals who completed the survey, 5 were selected and interviewed to gain further insight on addressing the research questions. The study's findings indicate that Catholic elementary school principals are primarily servant leaders and a principal's vision incorporates the mission and values that Catholic schools were created upon. In addition, principals create, maintain, and further the Catholic identity of their schools through various activities and the curriculum as well as incorporate buy-in, the use of data, collaboration, and knowledge of the community in order to create a culture of academic success at their schools. Overall, this study provides pastors, the superintendent, and the Department of Catholic Schools with valuable information on what is occurring and what needs to be improved upon within the Archdiocese of Los Angeles Catholic Schools. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]