Cierszewo [t͡ɕɛrˈʂɛvɔ] is a village in the administrative district of Gmina Brudzeń Duży, within Płock County, Masovian Voivodeship, in east-central Poland. It lies approximately 9 kilometres (6 mi) south of Brudzeń Duży, 13 km (8 mi) north-west of Płock, and 109 km (68 mi) north-west of Warsaw.

The village had a population of 21(last recorded in 2008).