RTU established on July 11, 1969 upon the approval by the Secretary of Education in response to the utmost request of the Provincial Board of Rizal, headed by the Governor Isidro S. Rodriguez, to put up a higher education institution in the Province of Rizal. It was first known as the College of Rizal.
The College of Rizal opened its classes on July 14, 1969 with course offerings in business administration, education and liberal arts. On March 20, 1975, the College of Rizal in Pasig and Rizal Technical High School in Mandaluyong, both situated in the Province of Rizal, were merged and converted into the Rizal Technological Colleges by the virtue of Presidential Decree (PD) No. 674 The decree authorized the expansion of curricular programs and promotion of researches in the development and conservation of natural resources in the Province of Rizal.