Kierżno [ˈkʲɛrʐnɔ] is a small village in the administrative district of Gmina Nowogrodziec, within Bolesławiec County, Lower Silesian Voivodeship, in south-western Poland.

It lies approximately 8 km (5 mi) north of Nowogrodziec, 10 km (6 mi) west of Bolesławiec, and 114 km (71 mi) west of the regional capital Wrocław. It is around 30 km (19 mi) from the German border.