Don Mariano Marcos Memorial State University (DMMMSU [ˈdimsʊ]; Filipino: Pang-alaalang Pamantasang Pampamahalaang Don Mariano Marcos[1]) is the state university system serving the province of La Union in the Philippines.

It was created by 10th president Ferdinand Marcos by using Presidential Decree 1778 to combine a number of state-run schools in La Union into a single state college in 1981.

La Union School of Arts and Trade was established in 1907 by D. Aran, an American, its founder and its first principal.

The intermediate curriculum was eventually dropped in 1927 and, in 1928, the La Union Trade School was transferred to its present site and converted into the secondary level.

By virtue of R.A. 543 on 16 June 1950, the La Union Trade School was placed under the support of the national government.

The school was integrated into the Don Mariano Marcos Memorial State University on 15 January 1981 through P.D.

In 1996, DMMMSU has been adjudged by the CHED (Commission on Higher Education) as number 7 among top universities and colleges (public and private) in the Philippines.

[citation needed] Dr. Ernesto R. Gapasin, former MLUC chancellor became the fourth president of the university.

The DMMMSU College of Arts and Sciences occupies a 15.5-hectare (38-acre) lot, consisting of several modern buildings, including a large library and an unfinished gymnasium.