Åsnen (Swedish pronunciation: [ˈôːsnɛn])[3] is a large lake in southern Småland, Sweden, roughly 150 km2 in size.

The river Mörrumsån flows south from Åsnen into the Baltic Sea.

[4] Fruit (mainly apples and strawberries) is grown in the southern parts of the surrounding area, including on Sirkön.

Åsnen is well known for its richness in native fish, and is a popular attraction for anglers.

The most common types of fish are pikeperch, pickerel, perch, and eels.