Ratowo [raˈtɔvɔ] is a village in the administrative district of Gmina Radzanów, within Mława County, Masovian Voivodeship, in north-central Poland. It lies approximately 3 kilometres (2 mi) north of Radzanów, 26 km (16 mi) south-west of Mława, and 104 km (65 mi) north-west of Warsaw. It is situated on the Mławka River, a tributary of Wkra, in the historic region of Zawkrze.