Marx is a masculine given name derived from Marcus (name).

• Marx Röist (1454–1524), mayor of Zürich
• Marx Reichlich (1460–1520), painter
• Marx Weiß (1518–1580) painter
• Marx Fugger (Markus Fugger; 1529–1597), Augsburg count
• Marx Rumpolt (born around 1581)
• Marx Augustin (1643–1685)
• Marx Karl Ernst Ludwig Planck (see Max Planck; 1858–1947)
• Marx Dormoy (1888–1941), French socialist politician
• Marx W. Wartofsky (1928–1997), American philosopher
• Marx Santos (born 1988), Brazilian football player

• Marx Augustin, fictional Austrian minstrel, bagpiper, and poet