Mlewo is a village in the administrative district of Gmina Kowalewo Pomorskie, within Golub-Dobrzyń County, Kuyavian-Pomeranian Voivodeship, in north-central Poland. It lies approximately 10 kilometres west of Kowalewo Pomorskie, 22 km north-west of Golub-Dobrzyń, and 20 km north-east of Toruń.