The Graduate School of Public Administration was granted an approval from the National Institute of Development Administration Council to extend its Master of Public Administration program in different regions to provide educational opportunities for service professionals in public and private sectors living in other provinces to pursue the course without commuting to Bangkok. In its initial phase in 1990, the Master of Public Administration program was offered at the Educational Center in Uttaradit as part of the NIDA-UTC project. The office was originally located at Uttaradit Teachers College, and later relocated to Phitsanulok in 1998.     

• The Graduate School of Public Administration offered the Master of Public Administration program at the Surat Thani Provincial Office.
• The office was located at Surat Technology School (currently renamed as Surat Commercial Technology College), in Mueang District, Surat Thani Province. It has been operated until present.

The doctoral program in Development Administration was revised and offered in English, with the primary focus on developing the institution as a hub for Development Administration education in the Southeast Asian region.

The National Institute of Development Administration was granted approval from the Ministry of Interior to use 486 rai of public land in Ban Nong Kham, Moo 8, Mittraphap Subdistrict, Nakhon Ratchasima, on February 12, 1993, to establish an educational center for the programs and training courses for local leaders and executives in both public and private sectors in the northeastern region and nearby areas. The institute developed a land development plan in 1993, and assigned faculty members of the Graduate School of Public Administration who were administrators of the Special Master's degree program in Public Administration for executives in Nakhon Ratchasima and the Northeast region, through the coordination with the Master Plan and the Planning Division Committee of the National Institute of Development Administration, to create various project plans for maximizing the land use. This effort was under the collaboration among government agencies, citizens and private sector.

     Later, the National Institute of Development Administration received kind support from Phra Rajthamchetiyajarn (Luangphor Viriyang Sirintharo), the abbot of Wat Dhammamongkol in Bangkok. He was firmly and perpetually committed to support higher education at the National Institute of Development Administration. He dedicated his physical and mental energy, financial resources, and the labor of his disciples to support the institute's activities. The stone-laying ceremony was held on April 29, 1993, and construction began on November 18, 1993. The first educational building at the Sikhio campus in Nakhon Ratchasima is a three-story building with classrooms, training rooms, offices, library, and faculty accommodations. The building's exterior reflects the Northeastern region’s style. During the construction, the institute received cooperation from various entities, including the 2nd Army Area in Nakhon Ratchasima, which supported temporary road construction to the building, the Royal Irrigation Department under the Ministry of Agriculture and Cooperatives under the Ministry of Agriculture and Cooperatives, which  allocated funds for constructing three ponds, and the Royal Forest Department under the Ministry of Agriculture and Cooperatives, which supported the planting of various tree species. Meanwhile, students and faculty members of The Graduate School of Public Administration contributed money and other resources. This led to the first building of the National Institute of Development Administration at Sikhio campus in Nakhon Ratchasima being named “Phra Rajthamchetiyajarn Building.” In 1995, The Graduate School of Public Administration relocated its office from the Nakhon Ratchasima Teachers College to the Sikhio Educational Center in Nakhon Ratchasima. 

      Subsequently, the faculty members, students, and staff of the Graduate School of Public Administration donated funds for the construction of a second building as an educational facility for the Graduate School of Public Administration and the National Institute of Development Administration, commemorating the 50th anniversary of His Majesty King Bhumibol Adulyadej’s (Rama IX) accession to the throne. Phra Rajthamchetiyajarn continued to extend his support and took responsibility for the construction. The stone-laying ceremony was held on Wednesday, December 27, 1995.

   On July 1, 2020, The Graduate School of Public Administration, through the collaboration with Suranaree School 2, moved its operations from the Sikhio Educational Center in Nakhon Ratchasima to the Sikhio Educational Center office in Nakhon Ratchasima, where it remains its operation to this day.

The Graduate School of Public Administration offered the Master of Public Administration program at the Udon Thani Provincial Office in cooperation with Udon Wittaya School in Udon Thani. This initiative was originated from students of the Special Master of Public Administration program at the Sikhio Provincial Office in Nakhon Ratchasima Province, who were working in Udon Thani and had to travel to the Sikhio Provincial Office for their studies. With the desire to promote educational opportunities to Udon Thani residents for a master’s degree program at a qualified institute, the consultations were then made with NIDA faculty members to extend the Special Public Administration program to Udon Thani. Upon the arrangement of land and location for the Udon Thani Provincial Office, Udonwittaya School was considered the most suitable place as it is centrally located in Udon Thani City and is easily accessible. Consultation was made and supported by Mr. Wiboon Triwatsuwan, the President of the Udon Thani Chinese Merchants Association first term. The Graduate School of Public Administration, National Institute of Development Administration, was granted access to Udonwittaya School as the educational center for the Special Master's program. Since the school was under the supervision and patronage of the Udon Thani Chinese Merchants Association, the collaborative education project for the Special regional Master's program in Udon Thani was established between the Graduate School of Public Administration and the Udon Thani Chinese Merchants Association, signed by the Dean of The Graduate School of Public Administration at the time and Mr. Wiboon Triwatsuwan, the President of the Udon Thani Chinese Merchants Association. After signing the project agreement, Mr. Wiboon Triwatsuwan initiated the construction of a new educational building.        

      In March 1995, during the construction of the new building, the first cohort of the Special Master's program in Udon Thani asked for permission to use the office of the Regional Treasury 4 as their temporary classrooms until the completion of the educational building. In January 1996, they moved to the Udonwittaya School (3rd floor) building.    
      Later, in 2020, they relocated the office to the Thailand National Sports University, Udon Thani Campus, Mueang District, Udon Thani, where it remains its operation to the present day.

The Graduate School of Public Administration was granted an approval from the National Institute of Development Administration Council on June 17, 1998, to offer the Special Master of Public Administration program (Management for Executives) in Chon Buri. A Memorandum of Understanding was signed with the Department of General Education to offer a Special Master of Public Administration program at Phothi Samphan Phitthayakhan School in Bang Lamung, Chonburi. Three cohorts were taught in total. Later, the National Institute of Development Administration relocated to the Interior College in Bang Lamung, Chon Buri, under an agreement between the National Institute of Development Administration and the Ministry of Interior. The Ministry of Interior permitted the Graduate School of Public Administration to use the 3rd floor of the Interior College building for conducting graduate-level educational programs. As part of the agreement, the Graduate School of Public Administration offered scholarships for Ministry of Interior officials to study at the Graduate School of Public Administration's educational centers nationwide.

The Lamphun Provincial Office received a donation of four plots of land, totaling 19 rai 1 ngan and 19 square wah, along with a 4-story concrete building in Mueang Chi, Mueang District, Lamphun, from Mrs. Dueanchai Ampunan, Mr. Chatchai Ampunan, Mr. Methee Wutthichayanan, and Mrs. Nansiri Ueakarawa, as a teaching and learning property for the Graduate School of Public Administration at the Lamphun Educational Center from the academic year 1996 to 2008. Currently, the institute has ceased its educational operations there, and the site has been repurposed as the "Community Learning Center" for social activities.

• Offered the Master of Public and Private Management program at the Sikhio Provincial Office in Nakhon Ratchasima.

Updated the master’s and doctoral degree programs in compliance with the standard criteria for graduate program and program management, and criteria for global quality assurance