The aims of this research are to: (1) study the conditions for fostering ethical leadership in the 21st century among school administrators. Under the jurisdiction of the Sukhothai Primary Educational Service Area Office, Area 2, Thailand; and (2) propose guidelines for strengthening ethical leadership in the 21st century of educational institution administrators. Under the Sukhothai Primary Educational Service Area Office, Area 2, Thailand, this is descriptive research. The group of informants in the research were nine school administrators using purposive sampling. The research instrument was a semi-structured interview form. Data were analysed using content analysis. The research results found that: (1) Conditions for enhancing ethical leadership in the 21st century among educational institution administrators. Under the jurisdiction of the Sukhothai Primary Educational Service Area Office 2, Thailand, it was found that the conditions for fostering ethical leadership in the 21st century among school administrators have 6 elements, consisting of: (1) justice; (2) honesty; (3) respect for others. Other (4) Responsibility; (5) Kindness; (6) Self-control; and (2) Guidelines for enhancing ethical leadership in the 21st century among school administrators. Under the jurisdiction of the Sukhothai Primary Educational Service Area Office, Area 2, Thailand, it was found that there should be guidelines for strengthening for educational institution administrators. By applying the principles of good governance Adhere to the principles of morality, ethics, adhere to the principles of democracy. Use the rule of law in complying with various laws and regulations with transparency. Honest Can be checked transparently. Adhere to the principles of participation Respect others Be responsible in your duties Know how to control yourself Limited resources are used efficiently. Set a good example in working so that work is efficient and effective.