O'Rear is an Irish surname. Notable people with the surname include:
Alf O'Rear (1923–2018), American politician and member of the Tennessee House of Representatives Bob O'Rear, seventh employee of Microsoft and developer of PC DOS Charles O'Rear (born 1941), American photographer Edward C. O'Rear (1863–1961), American politician and Justice of the Kentucky Court of Appeals Jim O'Rear, American actor, screenwriter, and director