Hammer is a surname. Notable people with the surname include:
A.J. Hammer (born 1966), American television and radio personalityAnthony Hammer, Australian actorArmand Hammer (1898–1990), U.S. physician, entrepreneur, oil magnate and art collectorArmie Hammer (born 1986), American actorBarbara Hammer (born 1939), American film makerBeatrice Hammer (born 1963), French writerBernhard Hammer (1822–1907), Swiss presidentBob Hammer (born 1930), American jazz pianist, composer and arrangerCec Hammer (1926–2013), Australian rules footballerCharles Christian Hammer (1952–2004), American classical guitaristChuck Hammer, American guitarist and composerDoc Hammer, American musician, actor, film and television writer, voice actor, and painterEdward E. Hammer (1931-2012), engineer who was at the forefront of fluorescent lighting researchEllen Hammer (1921-2001), American historianEmanuel Frederick Hammer (1926–2005), American psychologist and authorEmerson Hammer (1856–1940), American politicianErnst Hammer (1884-1957), highly decorated Generalleutnant in the Wehrmacht during World War IIFrederic E. Hammer (1909–1980), New York politician and judgeFriedrich Julius Hammer (1810–1862), German poetHeathcote Hammer (1905-1961), Australian World War II generalJan Hammer (born 1948), composerJay Hammer (born 1944), American actorJohn Hammer (born 1935), founder of sporting competitions for older playersJon Ludvig Hammer (born 1990), Norwegian chess playerJørgen Hammer (born 1991), Norwegian association football playerJoshua Hammer (born 1957), American journalistJulie Hammer (born 1955), Royal Australian Air Force air vice marshal, first woman to be promoted to one-star and two-star rankKim Hammer (born 1958), member of the Arkansas House of RepresentativesKristian Hammer (born 1976), Norwegian Nordic combined skierLance Hammer, American independent filmmakerLisa Hammer (born 1967), American filmmaker, actress, composer and singerMarion P. Hammer, American gun rights activist, first female president of the National Rifle AssociationMichael Hammer (disambiguation), multiple peopleMoshe Hammer (born 1946), Canadian violinistPeter Ladislaw Hammer (1936-2006), Romanian-born American mathematicianReuven Hammer (born 1933), Conservative Jewish rabbi, scholar, author and lecturerSarah Hammer (born 1983), American professional racing cyclist and two-time Olympic silver medalistSimon Christian Hammer (1866–1932), Norwegian writer and journalistVictor Hammer (1882–1967), Austrian-born American painter, sculptor, printer and typographerWilliam C. Hammer (1865-1930), U.S. Representative from North CarolinaWilliam Joseph Hammer (1858–1934), American electrical engineer and aviator; president of the Edison PioneersZevulun Hammer (1936–1998), Israeli politician