Mortier is a surname. Notable people with the surname include:
Édouard Mortier, Duke of Trévise (1768–1835), French general Erwin Mortier (born 1965), Belgian author Gerard Mortier (1943–2014), Belgian opera director Gilberte Mortier (1907–1991), French freestyle swimmer Hans Mortier (1924–2010), Dutch professional wrestler Marc Mortier (1948–2004), CEO of Flanders Expo from 1986 to 2002 Michel Mortier (1925–2015), French furniture designer, interior designer and architect Pieter Mortier (1661–1711), 18th-century mapmaker and engraver from the Northern Netherlands Roland Mortier (1920–2015), Belgian scientist