The concept of belonging is considered an essential need, and the impact of belonging has been studied by many. However, limited research has been conducted on the impact of belonging of those who work in schools, especially those who are the only individuals engaged in their role, known as Onlies. The purpose of this study was to gain an understanding of the factors that contribute to the sense of belonging for the Onlies. Data were collected from a survey, that was distributed nationally online (n = 233), and individual interviews (n = 6). Results indicate that Onlies have less of a sense of belonging than NonOnlies, those individuals who have a cohort, such as teachers who teach the same grade level. Sense of belonging for Onlies is positively related to administrator support and negatively associated with school problems. Recommendations for practices school leaders can implement to support the people who work in their schools are made, such as creating a climate of inclusion, working to create satisfactory workplace conditions, and providing moral support to school staff. [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://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]