Landzmierz [ˈland͡zmjɛʂ] is a village in the administrative district of Gmina Cisek, within Kędzierzyn-Koźle County, Opole Voivodeship, in south-western Poland. It lies approximately 2 kilometres (1 mi) north of Cisek, 6 km (4 mi) south of Kędzierzyn-Koźle, and 46 km (29 mi) south-east of the regional capital Opole.