Lubomierz [luˈbɔmʲɛʂ] (German: Liebenthal) is a town in Lwówek Śląski County, Lower Silesian Voivodeship, in south-western Poland. It is the seat of the administrative district (gmina) called Gmina Lubomierz. It lies approximately 13 kilometres (8 mi) south-west of Lwówek Śląski, and 108 kilometres (67 mi) west of the regional capital Wrocław.
As of 2019, the town has a population of 1,979.
Hieronymus Vietor (ca. 1480 – 1546/1547), printer and publisher