| Hainer See | |
| Location: | Saxony |
| Coords: | 51.17°N 12.4669°W |
| Pushpin Map: | Saxony |
| Basin Countries: | Germany |
| Area: | 4km2 |
| Max-Depth: | 49m (161feet) |
| Volume: | 73000000m2 |
| Shore: | 12km (07miles) |
| Elevation: | 126m (413feet) |
| Cities: | Borna |
Hainer See is a lake near Borna, Saxony, Germany. At an elevation of 126 m, its surface area is 4km². The lake is a part of the Central German Lake District.