De Coninck (Old Dutch spelling variant of "the king") is a surname, most common in Belgium. It can refer to:
Albert De Coninck (1915–2006), Belgian communistDavid de Coninck (c. 1644 – c. 1703), Flemish painterFrançois de Coninck (1902 – after 1928), Belgian rowerFrank De Coninck (born 1945), Belgian Ambassador to the Holy SeeFrédéric de Coninck (1740–1811), Dutch merchant active in CopenhagenGiles de Coninck (1571–1633), Flemish Jesuit theologianHerman de Coninck (1944–1997), Flemish poet, essayist, journalist and publisherMonica De Coninck (born 1954), Flemish politicianPatrice de Coninck (1770–1827), Flemish juristPieter de Coninck (died 1332/3), Flemish leader of the Battle of the Golden SpursWim De Coninck (born 1959), Belgian footballer