Usop is an Indonesian family name used by the Dayak people.
Usop or USOP may also refer to:
Entertainment United States of Poetry, an American television series Usop Sontorian, a Malaysian animated cartoon series
People K. M. A. Usop, (Kema Muhammad Aini Usop, 1936 – 2015), an Indonesian academic and politician Usop, a member of the Kopratasa male vocal trio in Malaysia
Sports USOP Association, the United States Olympians and Paralympians Association USOP Committee, the United States Olympic & Paralympic Committee USOP National Pickleball Center, home of the U.S. Open Pickleball Championships
See also Usopp, a fictional manga character