Leclercq, LeClercq, or Le Clercq (French pronunciation: [ləklɛʁ]) is a surname, and may refer to:

• Arnaud Leclercq (born 1967), French author
• Auguste Bouché-Leclercq, French historian
• Carlotta Leclercq (1838–1893), British actor
• Chrétien Le Clercq, 17th century, New France missionary
• Daniel Leclercq (1949–2019), football player
• Eugène Leclercq (1832–1908), draughts world champion
• Fabien Leclercq (born 1972), French footballer
• Frédéric Leclercq (born 1978), bassist
• Gaston LeClercq (c.1904–1944), Belgian long-distance runner
• Hugo Pierre Leclercq (born 1994), better known by his stage name Madeon, a French DJ.
• Jacques Leclercq (1891–1971), Belgian theologian and priest
• Jean Leclercq (disambiguation), several people
• Jean-Claude Leclercq (born 1962), French bicycle racer
• Jean-Marc Leclercq, French singer
• Jeanne Leclercq (1868–1914), French opera singer
• Julien Leclercq (disambiguation), several people
• Michel Leclercq, French billionaire businessman
• Olivier Leclercq, French businessman
• Patrick Leclercq (born 1938), Minister of State of Monaco
• Robin Leclercq (born 1952), French former footballer
• Rose Leclercq (1843–1899), English actor
• Salomone Leclercq (1745–1792), French Roman Catholic martyr and saint.
• Suzanne Leclercq (1901–1994), Belgian paleobotanist
• Tanaquil LeClercq (1929–2000), ballet dancer