Kärner is a common Estonian surname (meaning "gardener"), with notable bearers including:
Aleksander Kärner (1880–1942), Estonian politician Hillar Kärner (1935–2017), Estonian chess player Irmgard Kärner (1927–2014), German chess player Jaak Kärner (1892–1937), Estonian sport shooter Jaan Kärner (1891–1958), Estonian poet and writer Jüri Kärner (1940–2010), Estonian biologist Olle Kärner (born 1977), Estonian orienteer