| Pyasachnik Reservoir | |
| Location: | Upper Thracian Plain |
| Coords: | 42.3881°N 24.5814°W |
| Type: | dam |
| Outflow: | Pyasachnik river |
| Pushpin Map: | Bulgaria |
| Basin Countries: | Bulgaria |
| Area: | 9.1km2 |
| Volume: | 206.53hm3 |
| Elevation: | 289m (948feet) |
The Pyasachnik Reservoir (Bulgarian: язовир Пясъчник) is located in the northwestern part of Upper Thracian Plain in southern central Bulgaria, along the river Pyasachnik, a left tributary of the Maritsa. It is situated northwest of the village of Lyuben in Plovdiv Province. The reservoir covers an area of 9.1 km2 and has a volume of 206.53 million m3. Pyasachnik Reservoir was constructed in 1958–1964. Its waters are used for the irrigation of about 270 km2 arable land.
The reservoir is a popular fishing area. The International Game Fish Association world record for a grass carp caught on hook was set in Pyasachnik Reservoir in 2009 — .[1]