DSU may refer to:
Organisations (Social Democratic Youth of Denmark) Directorate of special units, the police tactical unit of the Belgian Federal Police German Social Union (East Germany) (), from 1990 , a Danish association for sport shooting Demobilised Soldiers' Union, a political party in Estonia Direct Source Unit, a sub-division of UK police forces dedicated to handling covert assets.
Education Dagestan State University, a public university in Makhachkala, Republic of Dagestan Dakota State University, a public university in Madison, South Dakota Dayananda Sagar University, a state private research university in Bengaluru, Karnataka Delaware State University, a public historically black university in Dover, Delaware Delta State University, a public university in Cleveland, Mississippi DeSales University, a private Catholic university in Center Valley, Pennsylvania DHA Suffa University, a private university run by the Pakistan Army Dickinson State University, a public university in Dickinson, North Dakota Distance State University, public university in the Republic of Costa Rica Dixie State University, now renamed Utah Tech University, a public university in St. George, Utah Dong Seoul University, a private technical college in Seongnam, South Korea
Student Union Dalhousie Student Union, representative of students at Dalhousie University Durham Students' Union, the students' union of Durham University Dutch Student Union, a national students' union of the Netherlands
Technology Data service unit, a WAN equivalent of a network interface card Decorate-sort-undecorate, a computer science programming idiom Disjoint-set data structure, a data structure used to track disjoint sets Distress signal unit, used by firefighters Dynamic software updating, upgrading programs while they are running
Other uses DSU (album), by Alex G (2014) Dispute Settlement Understanding, in the World Trade Organization