Lecoq is a surname. Notable people with the surname include:
Karl Ludwig von Lecoq (1754–1829) of French Huguenot ancestry, first joined the army of the Electorate of Saxony, later transferred his loyalty to the Kingdom of Prussia and fought Napoleonic Wars
Karl Christian Erdmann von Lecoq (1767–1830), a Saxon officer who rose to rank lieutenant-general during the Napoleonic Wars and was the commanding officer of the Royal Saxon army