Langaard is a surname. Notable people with the surname include:
Borghild Langaard (1883–1939), Norwegian operatic soprano Christian Langaard (1849–1922), Norwegian industrialist and art collector Conrad Langaard (1823–1897), Norwegian businessman Conrad Langaard (tennis) (1890–1950), Norwegian tennis player Knut Christian Langaard (1886–1965), Norwegian athlete Mads Langaard (1815–1891), Norwegian brewery owner and industrialist