Valjevska Tamnava

Valjevska Tamnava (Serbian: Ваљевска Тамнава) is a historical subregion (or microregion) in Serbian Posavina in west Serbia. It includes villages in the area of Obrenovac, Lajkovac, Ub, Valjevo and Koceljeva. It was a knežina (Christian self-governing village group) in the Sanjak of Smederevo and a knežina (administrative unit) in Revolutionary Serbia.

Further, the Posavina (Sava basin) region includes the microregions of Posavina and Posavotamnava.