| Sazlıdere Dam | |
| Name Official: | Sazlıdere Barajı |
| Dam Crosses: | Sazlıdere |
| Dam Type: | A |
| Location: | Başakşehir, Istanbul Province, Turkey |
| Dam Height: | 23m (75feet) |
| Construction Began: | 1992 |
| Res Capacity Total: | 91.3 hm³ |
| Res Surface: | 10 km² |
| Coordinates: | 41.1058°N 28.7183°W |
| Location Map: | Turkey |
Sazlıdere Dam is a reservoir dam in the Başakşehir district of Istanbul Province, Turkey. The dam supplies the European side of the city and its suburbs with drinking water. The Turkish State Hydraulic Works backed the development of the dam, which was constructed between 1992 and 1996. The reservoir supplies 50 hm³ of drinking water annually.