Marquardt is a surname of German origin. Notable people with the surname include:
August F. Marquardt (1850–1925), American politicianBridget Marquardt (born 1973), American television personality, glamour model, and actressChristel Marquardt, judge on the Kansas Court of AppealsChristiane Marquardt (born 1958), retired East German sprinterDarcy Marquardt (born 1979), Canadian rowerDavid Marquardt, co-founder of venture capital firm August CapitalDonald Marquardt (1929–1997), American statisticianElizabeth Marquardt, author of Between Two Worlds: The Inner Lives of Children of DivorceHeinz Marquardt (1922–2003), German Luftwaffe fighter aceJoachim Marquardt (1812–1882), German historian and writer on Roman antiquitiesMarkus Marquardt (born 1970), German operatic baritoneMike Marquardt (born 1982), American football defensive tackleNate Marquardt (born 1979), American mixed martial artistOllie Marquardt (1902–1968), infielder in Major League BaseballR. Niels Marquardt (born 1953), American diplomatStephen R. Marquardt, American surgeon