Postsee

54°13′50″N 10°14′27″E / 54.23056°N 10.24083°E / 54.23056; 10.24083Primary inflowsAlte Schwentine, Nettelau, Honigau, Neuwührener AuPrimary outflowsSchwentineBasin countriesGermanyMax. length4.8 km (3.0 mi)Max. width1.2 km (0.75 mi)Surface area276.4 ha (683 acres)Average depth3.9 m (13 ft)Max. depth9.1 m (30 ft)Shore length¹11.1 km (6.9 mi)Surface elevation20.6 m (68 ft)SettlementsPreetz¹ Shore length is not a well-defined measure.

Postsee is a lake in Kreis Plön, Schleswig-Holstein, Germany. At an elevation of 20.6 m, its surface area is 276.4 ha.