Hahn is a German surname. Notable people with the surname include:
Alfred Hahn (1890–1964), architect in Toledo, Ohio, USAArchie Hahn (1880–1955), American sprinterAugust Hahn (1792–1863), German Protestant theologianBernard Hahn (1860-1931), American politicianBilly Hahn (born 1955), American basketball coachCarl Hugo Hahn (1818–1895), German missionary in NamibiaCarl Wilhelm Hahn (1786–1835), German zoologistJoe Hahn (born 1977), DJ of Linkin ParkJohannes Hahn (born 1957), Austrian politicianDave Hahn (born 1959), guitarist, singer/songwriterDavid Hahn, the "Radioactive Boy Scout"David Hahn (Nebraska), 2006 Democratic candidate for Governor of NebraskaDavid Hahn (cartoonist), cartoonistDirk Meinerts Hahn (1804–1860), German captainEdith Hahn Beer (1914–2009), Jewish Holocaust survivorErwin Hahn (1921–2016), U.S. physicist, best known for his work on nuclear magnetic resonance (NMR)Frank Hahn (1925–2013), Cambridge economistHans Hahn (mathematician) (1879–1934), Austrian mathematicianHans "Assi" Hahn, (1914-1982), German World War II fighter aceHilary Hahn (born 1979), violinistJames K. Hahn (born 1950), politician, 40th Mayor of Los Angeles, CaliforniaJanice Hahn, politician, member of the Los Angeles City CouncilJerri Ariel Farias Hahn, Brazilian footballerJessica Hahn (born 1959), celebrity, nude model, and church secretaryJody Margolin Hahn, American television directorJörg-Uwe Hahn (born 1956), politicianKathryn Hahn (born 1974), actressKenneth Hahn (1920–1997), politician, member of the Los Angeles County Board of SupervisorsKimberly Hahn (born 1957), Catholic author and apologistKurt Hahn (1886–1974), German teacher and education reformerLloyd Hahn (1898–1983), American middle-distance runnerMartin Hahn (born 1964), Venezuelan telenovelas writerOtto Hahn (1879–1968), German nuclear chemist, discoverer of nuclear fission, Nobel Prize winner (Chemistry 1944), founder of the Max-Planck-Society, peace activistPhilipp Matthäus Hahn (1739–1790), German priest and inventorReynaldo Hahn (1874–1947), Venezuelan composer and lover of Marcel ProustScott Hahn (born 1957), Catholic writer and apologistWilliam Hahn (1829–1887), German painterWilliam John Hahn (1841–1902), Minnesota Attorney GeneralWolfgang Hahn (1911–1998), German mathematician