Berthier is a surname. Notable people with the surname include:
Alexandre Berthier (1638–1708), French officer posted to Canada Clément Berthier (born 2000), French para table tennis player Ferdinand Berthier (1803–1886), French writer, educator, and advocate for societal inclusion of those experiencing Deafness Guillaume-François Berthier (1704–1782), Jesuit writer Jacques Berthier (1923–1994), Taizé composer Jacques Berthier (1916 – 2008), French actor Jean-Marie Berthier (1940 - 8 August 2017), French poet Louis-Alexandre Berthier (1753–1815), Marshal of France under Napoleon Pierre Berthier (1782–1861), geologist