Ustronie [usˈtrɔɲɛ] is a village in the administrative district of Gmina Lwówek Śląski, within Lwówek Śląski County, Lower Silesian Voivodeship, in south-western Poland.

It lies approximately 8 kilometres (5 mi) north-east of Lwówek Śląski, and 99 kilometres (62 mi) west of the regional capital Wrocław.