Children and adolescents in the United States spend many hours in school. Students with chronic health conditions (CHCs) may face lower academic achievement, increased disability, fewer job opportunities, and limited community interactions as they enter adulthood. School health services provide safe and effective management of CHCs, often for students with limited access to health care. A systematic review to assess the role of school health services in addressing CHCs among students in Grades K-12 was completed using primary, peer-reviewed literature published from 2000 to 2015, on selected conditions: asthma, food allergies, diabetes, seizure disorders, and poor oral health. Thirty-nine articles met the inclusion criteria and results were synthesized; however, 38 were on asthma. Direct access to school nursing and other health services, as well as disease-specific education, improved health and academic outcomes among students with CHCs. Future research needs to include standardized definitions and data collection methods for students with CHCs.