Nichlava (Ukrainian: Нічлава; medieval name - Sarnik) is a river in Ukraine, within the Chortkiv Raion of Ternopil Oblast.

Left tributary of the Dniester (Black Sea basin).

[1] It flows within the Podolsk Upland mainly to the south.

The confluence of the Nichlavka and Nichlava rivers is located between the villages of Kolyndiany and Davydkivtsi.

Above the river are the following villages, towns, cities (from the source to the mouth): Chahari, Krohulets, Kotsyubyntsi, Zhabyntsi, Probizhna, Velyki Chornokintsi, Davydkivtsi, Tarnavka, Pylatkivtsi, Zhylyntsi, Lanivtsi, Verkhnyakivtsi, Borshchiv, Vysichka, Pyshchatyntsi, Strilkivtsi, Skoviatyn, Shyshkivtsi, Khudiivtsi, Babyntsi, Pylypche, Mykhalkiv, Ustia.