This study aimed to reveal the role of school management in promoting global citizenship among students at the UNESCO associated and non associated schools in Oman from the point of view of (principals, assistant principals and first teachers). The descriptive approach was used in data collection through two tools: the questionnaire and the interview card. The questionnaire consisted of four areas: planting concepts of peace and international cooperation, spreading awareness of global issues, activating joint dialogue and human rights, and preserving the world heritage and the environment. As for the interview card, it consisted of (10) questions. The questionnaire was applied to a sample of (168) principals, assistant principal, and senior teacher of associated and non-associated schools in all governorates of the Sultanate of Oman. As for the interview, it was conducted on a sample of (10) school principals and assistant principals of UNESCO associated and non-associated schools in Oman. The estimates of the individuals in the questionnaire came about the role of school administration in promoting global citizenship for students in the associated schools with an average score of (4.14), and the responses of individuals in the study sample in non-associated schools showed an average score of (3.90). However, the results of the interview showed that the role of school administration in promoting global citizenship for students at associated schools came in a high degree. Whereas it came in a weak degree at non associated schools for UNESCO. The results of the study sample responses was revealed a statistically significant differences between the averages of the responses of the study sample individuals on the role of school administration in promoting global citizenship for students at the UNESCO associated and non-associated schools in the Sultanate of Oman in the tool as a whole due to the variable of the type of school and in favor of UNESCO associated schools. In light of these findings, the study comes up with a set of proposed measures to improve the practices of school administration for promoting global citizenship among students in UNESCO associated and non-associated schools in the Sultanate of Oman. The most important of which is to attach school administration to training programs on global citizenship topics.