Stara Rzeka [ˈstara ˈʐɛka] (German: Altwasser) is a village in the administrative district of Gmina Grębocice, within Polkowice County, Lower Silesian Voivodeship, in south-western Poland. It lies approximately 4 kilometres (2 mi) south of Grębocice, 11 km (7 mi) north-east of Polkowice, and 78 km (48 mi) north-west of the regional capital Wrocław.