The Student Welfare Organisation in Trondheim (Norwegian: Studensamskipnaden i Trondheim) or SiT is the student welfare organisation in Trondheim, Norway and is responsible for the welfare of about 25,000 students at the Norwegian University of Science and Technology (NTNU), and Queen Maud's College of Early Childhood Education (DMMH).

[1] Among the responsibilities of SiT include housing for 3000 students, four gyms, kindergarten places, ten cafés, the seven book stores SiT Tapir, psychologists, advisors, career centre, heath station and economic support arrangements.

The housing for students is located at Berg, Singsaker, Øya, Moholt, Jakobsli, Lerkendal, Teknobyen, Nedre Berg and Steinan.

Facilities are located on ten campuses in town, including Gløshaugen, Dragvoll, Øya, Tyholt, Kalvskinnet, Moholt, Leangen, Rotvoll, Tunga, Trondheim and DMMH.

SiT is led by a board, with the majority and chairman being students.