Lecocq is a French surname. Notable people with the surname include:

• Alexandre Charles Lecocq (1832–1918), French operetta composer
• Barbara Ann LeCocq, the birth name of Barbara Lea (1929–2011), American jazz singer
• Bernardo Lecocq (1734–1820), Spanish military engineer
• Charlotte Lecocq (born 1977), French politician
• Francisco Lecocq (1790–1882), Uruguayan entrepreneur and politician
• Jean-Pierre Lecocq (1947–1992), molecular biologist and entrepreneur
• Karen LeCocq, American artist
• Louis LeCocq (1892–1919), American racecar driver
• Marc LeCocq (born 1966), Canadian curler
• Pascal Lecocq (born 1958), French painter and set designer
• Stéphane Lecocq (born 1976), French footballer

• Coq