Hahn may refer to: Places Hahn (crater), on the Moon Hahn (Holzhausen), a hill in Hesse, Germany Hahn, Rhineland-Palatinate, a municipality in Germany Hahn Air Base, a former frontline NATO facility near Hahn Frankfurt–Hahn Airport Hahn, Texas, U.S. Businesses The Hahn Company, a defunct American shopping center owner and developer Hahn Air, a German airline Hahn Group, a German industrial company Hahn Brewery, a brewery in Sydney, Australia Hahn Fire Apparatus, a defunct American manufacturer of fire engines and buses People Hahn (surname), a German surname (including a list of people with the name) Ida, Countess von Hahn-Hahn (1805–1880), German author von Hahn, the name of the German-Baltic-Russian noble family Other uses Hahn series, a mathematical formal infinite series Hahn–Banach theorem, theory in functional analysis See also Han (disambiguation) Hann (disambiguation) Hahne