Eskilstunaån (Eskilstuna River) is a small river in Sweden, length 32 km, running through the city of Eskilstuna and the town of Torshälla in Södermanland County. The river drains Lake Hjälmaren into Lake Mälaren. It is by local custom alternatively referred to as Torshällaån (Torshälla River) in its lower course from Torshälla to Lake Mälaren.
