UDM can stand for:
- U Da Man, Internet and text message slang for "You are the man"
- Unified Dimensional Model, a data model used in Microsoft Analysis Services
- Unit Deployment Manager, the person in charge of military deployments for individual military units.
- United Democratic Movement (South Africa), a political party
- Union of Democratic Mineworkers, a trade union in Nottinghamshire, England
- Universal Data Model
- Universal Docking Module (a portion of the International Space Station)
- Université de Montréal (more often abbreviated as UdeM)
- University of Detroit Mercy
- User Data Module
- The three letter language code (.udm) for the Udmurt language
- Universidad de Manila, a university in Manila, Philippines