Kałużna [kaˈwuʐna] is a village in the administrative district of Gmina Olszyna, within Lubań County, Lower Silesian Voivodeship, in south-western Poland.

It lies approximately 5 kilometres (3 mi) south of Olszyna, 11 kilometres (7 mi) south-east of Lubań, and 118 kilometres (73 mi) west of the regional capital Wrocław.