Åmänningen is a lake situated within the municipalities of Fagersta and Surahammar in Västmanland, and contributes to the primary drainage network of the Norrström River.

In test fishing, european perch, white bream, ruffe and northern pike have been caught in the lake.

The most common birds breeding on the islands of Åmänningen and its surroundings are, for example, common terns, black-headed gulls, gulls, mallards, Canadian gooses, great crested grebes, black-throated loones, sea hawks, sanpipers and herons.

There are also beavers, otters and european perch in Åmänningen and its surrounding streams and lakes.

These included Olof Arborelius, Mauritz Lindström, Ernst Lundström, Axel Fahlcrantz and others.

In Ängelsberg there are three houses designed by the famous architect Isak Gustaf Clason, namely (Ulvaklev, Hvilan and Odensnäs).

The Barkens Steamboat Association operates passenger traffic on the Strömsholm Canal with Ångfartyget Runn.

Bloomeries in Dunshammar, two km south of Ängelsberg, are the oldest link in a 1500-year tradition of iron making in the area.

In 1876, an oil refinery was established on the island of Barrön, now called Oljeön, in Lake Åmänningen.

The Kolbäcksån river that drains the catchment area has tributary order 3, which means that the water flows through a total of 3 watercourses before reaching the sea after 187 kilometers.

The catchment area has 25.55 square kilometers of water surface, giving it a lake percentage of 26.5 percent.