Konstantynów [kɔnstanˈtɨnuf] is a village in Biała Podlaska County, Lublin Voivodeship, in eastern Poland. It is the seat of the gmina (administrative district) called Gmina Konstantynów. It lies approximately 20 kilometres (12 mi) north of Biała Podlaska and 113 km (70 mi) north of the regional capital Lublin.
The village has a population of 1,437. From 1974 to 1991, the Warsaw radio mast—the second-tallest human-made structure ever built, and during its existence the tallest—was located nearby.