Tuba National High School-Extension was established on June 19, 2002. It is located at Poblacion, Tuba, Benguet, which is about six kilometers away from Baguio City. The present school site, which has a total land area of 5, 000 square meters, is owned by the Tuba Municipal Government but was turned over to the Department of Education (DepEd) through a Contract of Usufruct.  

            This school is under the over-all management of Tuba National High School-Main, which is located in Nangalisan, Tuba, Benguet. The school stakeholders, however, are clamoring for the separation of TNHS-Extension. The House of Representatives of the Philippine Congress on June 24, 2004 actually approved and passed House Bill 2695: “An Act Establishing a National High School in Poblacion, Tuba, Benguet to be known as Tuba Central National High School and Appropriating Funds Therefore.” This bill is still pending in the Philippine Senate for concurrence.