Eder may refer to:
People Eder (surname) Éder (given name), a Portuguese or Spanish given name Éder (footballer, born 1986), Brazilian footballer Éder Citadin Martins Eder (footballer, born 1987), Portuguese footballer from Guinea-Bissau Ederzito António Macedo Lopes Eder, Josef Maria (born 1855), Austrian chemist who specialised in photography.
Other uses Eder (Fulda), a river in western Germany, tributary to the Fulda Eder (Eggel), a river in western Germany, tributary to the Eggel Eder (finance), a social institution of Ethiopia