Stronie Śląskie [ˈstrɔɲɛ ˈɕlɔ̃skʲɛ] (German: Seitenberg) is a town in Kłodzko County, Lower Silesian Voivodeship, in south-western Poland. It is the seat of the administrative district (gmina) called Gmina Stronie Śląskie, close to the Czech border. It lies approximately 23 kilometres (14 mi) south-east of Kłodzko, and 93 kilometres (58 mi) south of the regional capital Wrocław. It is located within the historic Kłodzko Land. As of 2019, the town has a population of 5,709.