Jönåker is a locality situated in Nyköping Municipality, Södermanland County, Sweden with 617 inhabitants in 2010. Jönåker is known locally for being situated right on a steep hill by local standards and the trading house, the so-called "Kalle in the hill" former gas station (). The railway passes through Jönåker, but trains do not stop there, instead twisting around the hill on the route between Nyköping and Norrköping.
Elections Jönåker forms the Lunda electoral district in Nyköping Municipality, named after the local church atop the hill that Jönåker sits beneath. 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.
Riksdag Year%VotesVSMPCLKDMSDNyDLeftRight1973 89.6 734 1.4 42.2 36.2 4.6 4.0 11.6 43.6 52.51976 91.3 753 0.9 39.7 37.6 6.6 2.3 12.9 40.6 57.11979 89.4 730 2.5 42.6 31.0 6.3 3.6 13.7 45.1 51.01982 88.2 727 1.8 43.3 1.0 30.5 5.0 3.2 15.3 45.1 50.81985 88.2 730 2.2 43.0 2.5 29.5 8.5 14.0 45.2 51.91988 83.3 706 2.5 44.6 7.2 22.7 7.1 4.2 11.6 54.4 41.41991 87.1 744 2.8 38.2 2.8 20.6 5.6 6.9 13.8 9.1 41.0 46.91994 86.6 741 5.3 49.3 4.5 15.9 3.0 5.5 14.0 0.9 59.0 38.51998 82.2 731 10.4 44.5 3.1 9.6 2.0 17.6 12.6 58.0 41.72002 78.7 696 5.9 47.7 3.3 11.2 7.8 14.1 9.5 0.3 56.9 42.52006 80.6 693 3.6 37.5 3.5 12.3 4.6 12.0 21.5 3.5 44.6 50.42010 83.1 761 3.8 30.6 5.3 10.6 5.0 8.0 26.4 8.5 39.7 50.12014 87.2 796 3.0 32.0 4.4 9.3 3.0 8.0 17.2 20.2 39.4 37.62018 86.3 766 4.4 27.2 3.0 12.8 2.2 9.4 14.1 25.2 47.4 50.92022 85.2 792 2.7 26.8 3.7 7.8 2.7 6.8 15.5 32.6 40.9 57.6
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