Stanisławów Pierwszy [staniˈswavuf ˈpjɛrfʂɨ] is a village in the administrative district of Gmina Nieporęt, within Legionowo County, Masovian Voivodeship, in east-central Poland. It lies approximately 5 kilometres (3 mi) south of Nieporęt, 9 km (6 mi) east of Legionowo, and 19 km (12 mi) north of Warsaw.