First Floor
- Full-service mail services
- University Store
- Paws
- Sweet Sensations in Paws
- Ticket Office
- Tiger Reels Video store
- Auxiliary Services Business Office
- The OneCard from Auxiliary Services
- University Union Information Desk
- Dining Services
- Susquehanna Food Court (mall-style eatery)
- Patuxent Room,more formal dining atmosphere)
- Severn Lounge (faculty/staff dining)
- Office of Student Government Association (SGA)
- Office of Student Activities, including Commuter Affairs Greek Life (fraternities and sororities), Student Leadership Programs
- Office of Black Student Union(BSU)
- Religious Activities Office
- Office of Campus Life
- Potomac Lounge (comfortable study and lounging spot)
- Loch Raven Room
- Offices of Event & Conference Services (scheduling and reservation of rooms)
- University Union administrative office
Third Floor
- Chesapeake Rooms (Large, multipurpose spaces)
- Conference Rooms
- Office of The Towerlight(student newspaper)
- African-American Cultural Center
- Office of Students Achieve Goals through Education (SAGE) Program
- Queer Student Union (QSU)
- Center for Student Diversity
- Various nooks and crannies for contemplation or conversation
University Union Garage
