Marquardt is a surname of German origin. Notable people with the surname include:
August F. Marquardt (1850–1925), American politician Bridget Marquardt (born 1973), American television personality, glamour model, and actress Christel Marquardt (), American jurist from Kansas Christiane Marquardt (born 1958), East German sprinter Darcy Marquardt (born 1979), Canadian rower David Marquardt (born 1949), venture capitalist Donald Marquardt (1929–1997), American statistician Elizabeth Marquardt (), author Erik Marquardt (born 1987), German politician
Joachim Marquardt (1812–1882), German historian and writer on Roman antiquities Lewis Marquardt (1936–2010), American politician and educator Markus Marquardt (born 1970), German operatic baritone Mike Marquardt (born 1982), American football player Nate Marquardt (born 1979), American mixed martial artist Ollie Marquardt (1902–1968), American baseball player R. Niels Marquardt (born 1953), American diplomat Roy Edward Marquardt (1917–1982), American engineer, inventor of the ramjet, founder of Marquardt Aircraft Co. Stephen R. Marquardt (1955–2022), American surgeon
Companies and enterprises Marquardt Group, a manufacturing company of electromechanical and electronic switches Marquardt Corporation, an aeronautical engineering firm
Other Marquardt, a neighbourhood of Potsdam, Germany Marquardt station, its railway station Schloss Marquardt, a castle in this neighbourhood
See also Marquardt Slevogt (1909–1980), German ice hockey player
Marquard (disambiguation) Marquart Markwart