Zastawek [zasˈtavɛk] is a village in the administrative district of Gmina Terespol, within Biała Podlaska County, Lublin Voivodeship, in eastern Poland, close to the border with Belarus. It lies approximately 8 kilometres (5 mi) south of Terespol, 31 km (19 mi) east of Biała Podlaska, and 110 km (68 mi) north-east of the regional capital Lublin.