Olszewnica Stara [ɔlʂɛvˈnit͡sa ˈstara] is a village in the administrative district of Gmina Wieliszew, within Legionowo County, Masovian Voivodeship, in east-central Poland.

[1] It lies approximately 8 kilometres (5 mi) west of Wieliszew, 6 km (4 mi) north-west of Legionowo, and 26 km (16 mi) north of Warsaw.

In the late 19th century, the village had a population of 390.

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