Chojnowo [xɔi̯ˈnɔvɔ] is a village in the administrative district of Gmina Sypniewo, within Maków County, Masovian Voivodeship, in east-central Poland. It lies approximately 4 kilometres (2 mi) west of Sypniewo, 21 km (13 mi) north-east of Maków Mazowiecki, and 91 km (57 mi) north of Warsaw.