Wleń (German: Lähn) is a town in Lwówek Śląski County, Lower Silesian Voivodeship, in south-western Poland. It is located on the Bóbr river in the historic Lower Silesian region, approximately 13 kilometres (8 mi) south-east of Lwówek Śląski, and 97 kilometres (60 mi) west of the regional capital Wrocław.