The Łutownia (Polish pronunciation: [wuˈtɔvɲa]; Belarusian: Лутоўня), in northeast Poland, is a left-bank tributary of the Narewka River.

It was formerly known in Polish as the Łętownia [wɛnˈtɔvɲa], Lętownia [lɛnˈtɔvɲa], Łotownia [wɔˈtɔvɲa], Łutownica [wutɔvˈnit͡sa], Latownica [latɔvˈnit͡sa], Lutownia [luˈtɔvɲa], and Szczekotówka [ʂt͡ʂɛkɔˈtufka] River.

The Łutownia flows through the European region known as the Wysoczyzny Podlasko – Bialoruskie (Podlasie-Belarus Plateau) in Poland's Podlasie Province and Belarus' Hrodna Voblast.

The river, from its origin to its mouth, flows through the Białowieża Forest.

This article related to a river in Poland is a stub.