Maejo University began to offer and teach graduate programs in 1985 in two master degree programs in agricultural extension and cooperative economics. Prior to this, the Graduate School was administered by an executive committee chaired by the University President since it was affiliated as a section under the Office of the President. However, in 1998, the Graduate School was officially approved by the University Senate Council and its organizational structure is presided by the School Dean.

Advanced studies of at least one but generally two years, combined with a thesis or a special problem, lead to the award of a master's degree. A doctorate requires an additional three years of study following a master's degree.

Admission requirements
1. An applicant must have a bachelor's degree or its equivalent from a recognized institution for those who wish to pursue a master's degree, and an equivalent master's degree for those who wish to further a doctoral degree.
2. An applicant must submit duly accomplished forms for admission including original transcripts of records, letters of recommendation and other documents specified by the Graduate School.
3. An applicant must pass the screening procedures and the qualifying examination prepared by the Graduate School.

Graduate Programs
1. Doctorate programs
    1.1 Doctor of Philosophy in Rural Planning and Development
2. Masteral programs
    2.1   Master of Science in Agricultural Economics
    2.2   Master of Science in Cooperative Economics
    2.3   Master of Science in Agricultural Extension
    2.4   Master of Science in Agricultural Resources and Environmental Management
    2.5   Master of Science in Agriculture and Forest Administration
    2.6   Master of Science in Agronomy
    2.7   Master of Science in Animal Production
    2.8   Master of Science in Food Technology
    2.9   Master of Science in Horticulture
    2.10 Master of Science in Seed Technology
    2.11 Master of Science in Soil Science
    2.12 Master of Arts in Development Administration
    2.13 Master of Arts in Communication Arts
    2.14 Master of Arts in Recreation and Tourism Management
    2.15 Master of Business Administration in Business Administration
    

Maejo University Chiang Mai Thailand