Siestrzechowice [ɕɛstʂɛxɔˈvit͡sɛ] (German Grunau) is a village in the administrative district of Gmina Nysa, within Nysa County, Opole Voivodeship, in south-western Poland. It lies approximately 5 kilometres (3 mi) south-west of Nysa and 52 km (32 mi) south-west of the regional capital Opole. In the village is a palace, built near the end of the 16th century and now partly in ruins.