Klek may refer to:
- Klek (Zrenjanin), a village in Serbia, in Zrenjanin municipality
- Klek, Croatia, a village in southern Croatia
- Klek mountain, Croatia
- Klek (peninsula), a peninsula near Neum, Bosnia and Herzegovina
- Klek, Karavanke, a peak in the Karavanke in Slovenia
- Klęk, a village in Poland