Valencia National High School is located in the center of Valencia, a developing town in Southern Bukidnon. The school was founded in 1969 through Barrio charter number 6054, led by Barangay Captain Mr. Carlos Bacolod and Assistant Principal Demetrio Dumaquita. It started with 105 students across four grade levels and had five teachers. 

As Valencia town grew, so did the school. In 1970-71, leadership passed to Mr. Pablito L. Intong, the principal of Valencia Central Elementary School. Mrs. Gene Bayagna took over as principal in 1971-72, and Mr. Bacolod was succeeded as Barangay Captain by Mrs. Lila Alkuino in 1972.