Lake Işıklı (Turkish: Işıklı Gölü) is a freshwater lake in Turkey's inner Aegean Region extending on Çivril Plain between the provinces of Denizli and Afyonkarahisar.

The lake is bordered by the boundaries of several districts, namely, clockwise Çivril (Denizli Province), the principal urban center of the region, and Kızılören, Dinar and Evciler (Afyonkarahisar Province).

Its waters fed by streams are used for irrigation for the surrounding agricultural lands and the lake is also an important fishing and aquaculture center at regional scale.

Lake Işıklı is an important site for breeding waterbirds and large numbers of wintering wildfowl.

[1] Some of the species that breed or migrate through Lake Işıklı are; greater white-fronted goose (Anser albifrons), red-crested pochard (Netta rufina), common pochard (Aythya ferina), ferruginous duck (Aythya nyroca), squacco heron (Ardeola ralloides), pygmy cormorant (Phalacrocorax pygmeus), common coot (Fulica atra), gull-billed tern (Sterna nilotica), whiskered tern (Chlidonias hybrida).