Catanduanes State University (CatSU; Filipino: Pamantasang Pampamahalaan ng Catanduanes) is a regional state, research and coeducational higher education institution and a green university in Virac, Catanduanes, Philippines, with external campus in Panganiban. CatSU is an ISO 9001:2015 certified public university.

The Catanduanes State University (CatSU) was established in Virac as the Virac National and Agricultural Trade School (VNATS) via the Republic Act 3398 dated June 18, 1961.

Catanduanes congressman José M. Alberto authored Republic Act 6341 which convertedthe VNATS into the Catanduanes State Colleges (CSC) on June 19, 1971. It started functioning as a tertiary education institution on December 1, 1971.

The Catanduanes Agricultural and Industrial College (CAIC) in Panganiban was integrated to CSC on October 31, 1999.

On October 19, 2012, President Benigno S. Aquino III signed Republic Act No. 10299 converting Catanduanes State Colleges (CSC) into Catanduanes State University (CatSU).

This institution is categorized as SUC Level III-A. Catanduanes State University is a comprehensive Higher Education Institution in the island province of Catanduanes and one of the dynamic SUCs in the region, offering a wide range of academic programs.

Vision - A globally-recognized green research University committed to excellent service to the nation

Mission - Foster excellence, holistic and inclusive education attuned to the demands of a diverse world towards the formation of productive and value-laden lives