Jönåker is a locality situated in Nyköping Municipality, Södermanland County, Sweden with 617 inhabitants in 2010.

[3] The railway passes through Jönåker, but trains do not stop there, instead twisting around the hill on the route between Nyköping and Norrköping.

Lunda used to be a swing district in that it can go the way of both traditional coalitions, although it is solidly to the right of urban Nyköping throughout its history.

Since 1973, while the district swung back and forth between the coalitions several times, the winning margins were rarely close.

In 2022, the area had shifted back decisively to the right and became the only district where the Sweden Democrats won a major plurality in the municipality.