Berthet is a French surname that may refer to

• Élie Berthet, (1815–1891), French novelist
• Georges Berthet, (1903–1979), French Olympic skier
• Gwenaël Berthet (born 1970), French Olympic sailor
• Jean-François Berthet (born 1969), French Olympic sailor, brother of Gwenaël
• Joseph Berthet, French Olympic rower
• Lola Berthet, (born 1980), Argentine actress
• Marcel Berthet (1888–1953), French cyclist
• Marius Berthet, French Olympic rower
• Raymond Berthet (1909–1979), French Olympic cross-country skier, brother of Georges
• Rémi Berthet (born 1947), French Olympic judoka
• Sébastien Berthet, (born 1978), French professional ice hockey player
• Vincent Berthet (born 1960), French Olympic equestrian