UNOSOM (United Nations Operation in Somalia) may refer to:

• UNOSOM I, an operation established in April 1992 and running until its duties were assumed by the UNITAF mission in December 1992
• UNOSOM II, an operation from March 1993 until March 1995
• UNITAF, an operation from December 1992 until May 1993
• Operation Provide Relief (Part of UNITAF)