Rościszewo [rɔɕt͡ɕiˈʂɛvɔ] is a village in Sierpc County, Masovian Voivodeship, in east-central Poland. It is the seat of the gmina (administrative district) called Gmina Rościszewo. It lies approximately 9 kilometres (6 mi) east of Sierpc and 112 km (70 mi) north-west of Warsaw.