Mahrt is a surname. Notable people with this surname include:
Al Mahrt (1893–1970), American football player Armin Mahrt (1897–?), American football player Haakon Bugge Mahrt (1901–1990), Norwegian writer Jan Bugge-Mahrt (born 1954), Norwegian diplomat Lou Mahrt (1904–1982), American football player Preben Mahrt (1920–1989), Danish actor
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