Fellner is a surname. Notable people with the surname include:
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Eduardo Fellner (born 1954), Argentine politician
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Eric Fellner (born 1959), British film producer
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Ferdinand Fellner (architect) (1847–1916), Austrian architect
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Ferdinand Fellner (painter) (1799–1869), German designer and painter
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Hermann Fellner (born 1950), German politician, representative of the Christian Social Union of Bavaria
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Jakab Fellner von Fellenthal, (1722–1780), Moravian-Hungarian architect
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Jamie Fellner, Senior Counsel for the United States Program of Human Rights Watch
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Liliana Fellner (born 1957), Argentine politician
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Rosie Fellner (born 1978), Irish actress
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Till Fellner (born 1972), Austrian pianist
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Werner Jaffé Fellner (1914–2009), German chemist and university professor
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Joe Fellner (born 1931–2018), Hungarian Holocaust survivor
{{surname, Fellner
German-language surnames