Utan Integrated School was established in 1960 as Nagattatan – Utan Elementary School. The name was derived for it is located in the boundary of the two barangays- Barangay Nagattatan and Barangay Utan which is sited in the innermost part of Allacapan Cagayan.The school is located 18 kilometers from the town proper. It is adjacent to Barangay Balluyan of the Muicipality of Flora Apayao in the west and Barangay Cabatacan of the Municipality of Lasam.
In 1960, Mr. Benjamin Catli was the first School head of Nagattatan – Utan Elementary School. Even before, the ambience of the school has a pleasant view. Constructed school building was on top of the hill surrounded by robust trees where birds love to stay. The said ambiance resulted in a tagged name for the beloved school; it was renowned as a Baguio City type of ambience. The position of the elementary department and the secondary department was also funny and cool in a positive way for somehow there is a literal description of its position. The elementary department was located at the bottom portion of the hill while the secondary department was on the top of the hill. This somehow represented the moving up of learners both in their level and their soon to be classroom.
In 1998, Mr. David U. Dela Cruz , the District Supervisor of Allacapan, Mr. Charlito Torida, the school head, and Mrs. Florence Atalip , the Master Teacher spearheaded the addition of the Secondary education by virtue of RA 9155. Their initiative paved way resulting to the approval of the conversion to integrated school that was approved within the year 1998, and effectively implemented its secondary education in the year 1999.
Through the years the school developed at its best both in education and infrastructures. In the year 2013, Mr. Rencimar Tabaldo, Principal I of UIS proposed for the addition of the Senior High School and was continued upon the succession of Mrs. Jesty G. Reynon proposing General Academic Strand (GAS) which was approved in 2015. In 2016, the Senior High School education was implemented. At present the mighty UIS is an Integrated School catering Elementary, Secondary and Senior High school. Through the years the school excelled in sports, academic and extracurricular activities.
For more than six decades now, UIS has proven its tradition of excellence and reputation of providing quality education, student-friendly school and values-centered institution. UIS has continuously formed graduates in personifying good values and virtues; thereby, making a difference in contributing to social transformation in the service of the nation and globally.