| Käku | |
| Settlement Type: | village |
| Pushpin Map: | Estonia |
| Pushpin Label Position: | top |
| Pushpin Map Caption: | Location in Estonia |
| Coordinates: | 58.3636°N 22.4867°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Estonia |
| Subdivision Type1: | County |
| Subdivision Name1: | Saare County |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Saaremaa Parish |
| Population Total: | 37 |
| Population As Of: | 01.01.2011 |
Käku is a village in Saaremaa Parish, Saare County, Estonia, on the island of Saaremaa.
Before the administrative reform in 2017, the village was in Lääne-Saare Parish.
It has a population of 37 .[1]
One of two Saaremaa Motoklubi's motocross circuits is located in Käku.[2]