Ubo may refer to:
- Ubo, the element symbol for Unbioctium
- Ubo, a barangay in Balud, Masbate, Philippines
- Ubo, a barangay in Daram, Samar, Philippines
- Ubo tribe, a tribe within the Lumad peoples of the Philippines
UBO may stand for:
- uBlock Origin, a content-filtering web browser extension
- Unincorporated business organization
- Université de Bretagne Occidentale, Brest, in the Academy of Rennes
- Universitetsbiblioteket i Oslo
- Cal Ripken's Real Baseball, also known as Ultimate Baseball Online
- Ultimate beneficial ownership, a term in domestic and international commercial law