Grabnik [ˈɡrabnik] is a village in the administrative district of Gmina Kampinos, within Warsaw West County, Masovian Voivodeship, in east-central Poland. It lies approximately 3 kilometres (2 mi) north-west of Kampinos, 28 km (17 mi) west of Ożarów Mazowiecki (the county seat), and 41 km (25 mi) west of Warsaw.