Hann may refer to:

People

• Adam Hann-Byrd (born 1982), American actor
• Allie Hann-McCurdy (born 1987), Canadian ice dancer
• Chris Hann (born 1953), British social anthropologist
• David Hann (born 1952), American politician
• Della Hann, American psychologist and research administrator
• Dorothy Hann, American beauty queen
• Frank Hann (1846–1921), Australian explorer
• Georg Hann (1897–1950), Austrian operatic bass-baritone
• Jason Hann, American percussionist
• Judith Hann (born 1942), English broadcaster and writer specialising in science
• Julius von Hann (1839–1921), Austrian meteorologist
• Les Hann (1911–1988), English footballer
• Marjorie Hann (1916–2011), South Australian painter and art teacher
• Matthew Hann (born 1980), English footballer
• Ng Tian Hann (born 1969), Malaysian Chinese movie director
• Quinten Hann (born 1977), Australian snooker player
• William Hann (1837–1889), Australian explorer and cattleman
• Wong Choong Hann (born 1977), Malaysian badminton player
• Hann Trier (1915–1999), German artist

Places

• Hann, Senegal
• Hann Land District, a region of the State of Western Australia
• Hann. Münden, a town in Lower Saxony, Germany
• Hann River, a river in the Kimberley region of Western Australia
• Han (state) (韓) state in China, called Hann to distinguish it from the homophonic Han (漢) state

Other uses

• Hann function, a mathematical function often used as a window function
• "Hann (Alone)", a 2018 song by (G)I-dle
• "Hann (Alone In winter)", a 2021 song by (G)I-dle from their 4th korean EP "I Burn"