The Pamantasan ng Bayan ng San Mateo (PBSM) was founded in October, 2004 under former Mayor Peping Diaz. It started with the help of Dean Narciso Quesada who served as the President that time, Mr. Ramon Epetia as the school administrator, Mr. Augusto Quesada as the school registrar and Mr. Jojo Bonifacio as staff officer. There were 40 pioneer students and 12 professors namely: Dean Narciso Quesada, Mrs. Estrella J. Cinco, Mr. Ramon Epetia, Mr. Augusto Quesada, Mrs. Onalyn Derequito, Mrs. Susana Sacatrapos, Mrs. Corazon Avena, Ms. Fernalyn Salvador, Mr. Glen Guardiano, Mrs. Liza Tan, Mr. Triny Bernardo and Dr. Ferdie Ampunin.

Originally, the PBSM had 2 rooms: 203 and room 204 respectively. Due to the on-going construction of the municipal hall, the Police Department had its office in the same building for almost 4 months from November to February, 2005; until it was transferred to its main office. Through the Career Talk initiated by the leadership of the school administrator, Mr. Ramon Epetia and the former president, Dean Narciso Quesada to the different high schools in San Mateo, the number of students had dramatically increased from 40 to 266 in 2005.Prior to this event the students had their first Christmas Party with Honorable Roberto San Pedro as the Chairman of Education in the Sangguniang Bayan ng San Mateo who also helped in the creation of the Board of Trustees.

The attainment of the vision and mission of the institution has become more intense due to the increasing number of students. Various activities have been conducted such as “Buwan ng Wika” and “G. at Bb. Pamantasan.” Also students were motivated to participate in the celebration of “Araw ng Lalawigang Rizal” and the “Kakanin Festival” which the PBSM won 3rd place in the Street Dancing Competition under the leadership of Mr. Santiago Cruz, professor of English.

Meanwhile, on the second semester of school year 2005-2006, the school conducted the election of officers of the Student Council. Ms. Maria Kristine G. Arnaldo won as the first president of the body. As an initial project, the body sponsored the celebration of the 1st Foundation Day and the blessing of the school on December 15, 2005. On the same day, the Oath taking of officers of the different clubs such as Junior Philippine Institute of Accountants (JPIA), Math Society and Student Council was undertaken.

However, before the school year ended, the conduct of the Fire Drill, in cooperation with the San Mateo Fire Department and Red Cross team of Rizal Chapter led by Mr. Voltaire Serraon had been done possible on March 25, 2006. On the latter part of the school year, a symposium entitled, “Emotional Intelligence” was conducted as the second project of the Student Council. As part of the Skill Enhancement Program, the 1st Literary Week celebration was held from November 27-29, 2006 under the supervision of Mrs. Susana J. Sacatrapos, English Society adviser.

With the unselfish support of the Sangguniang Bayan ng San Mateo under the leadership of the municipal mayor, the Board of Regents and the faculty, the school has gradually created its unique way of serving the youth particularly those deserving but less privilege students.

As it promotes betterment of the youth, it is hoped that more students in San Mateo and other nearby towns will be encouraged to be part of this institution with an affordable tuition fee of P130.00/unit. Furthermore, the faculty which is composed of educators who are graduates of Master’s Degree and Doctorate Degree have affirmed and expressed their continued support in order to attain the ultimate goal of higher education.