Dallemagne is a surname. Notable people with the surname include:
Augustine Dallemagne (1821–1875), French miniature painter Claude Dallemagne (1754–1813), French commander during the Napoleonic Wars Georges Dallemagne (born 1958), Belgian politician and doctor Marcel Dallemagne (born 1898), French professional golfer Aimé Dallemagne (1882–1971), French painter