Lake of Flatschach (German: Flatschacher See) is an Austrian lake at Flatschach near Feldkirchen in Kärnten in the State of Carinthia.

Since its inflow passes through a region heavily used for agriculture, the lake is heavily contaminated with nutrients.

[1] The lake itself is located in the 272 hectares (670 acres) protected area of 'Flatschacher See'.

[1] The following species of fish are found in Lake Flatschacher: Carassius carassius, Carp, Cyprinus carpio, common rudd, Rutilus rutilus and Sander lucioperca.

This Carinthia location article is a stub.