Eskilstuna is a city and the seat of Eskilstuna Municipality, Södermanland County, Sweden. The city of Eskilstuna had 69,948 inhabitants in 2020, with a total population of 107,806 inhabitants in Eskilstuna municipality 2023. Eskilstuna has a large Sweden Finn population. The town is located on the River Eskilstunaån, which connects Lake Hjälmaren and Lake Mälaren.

Athletic Football Club Eskilstuna, also known as AFC Eskilstuna or simply AFC, is a Swedish professional football club based in Eskilstuna. The club has previously been known under the names FC Café Opera and Väsby United before switching ownership and their identity again in 2012 to AFC United. During the 2016 season it was once again decided that they would switch their name, identity, as well as locality. Choosing to move to Eskilstuna, about 110 kilometers west of Stockholm, they are since known as AFC Eskilstuna. They compete in Ettan, the third highest tier of Swedish football, and play their home matches at Tunavallen. AFC Eskilstuna are affiliated to Södermanlands Fotbollförbund.