Knežak (pronounced [knɛˈʒaːk]; German: Grafenbrunn, Italian: Fontana del Conte) is a village on the main road from Postojna to Ilirska Bistrica in the Inner Carniola region of Slovenia. It belongs to the Municipality of Ilirska Bistrica.

The parish church in the settlement is dedicated to the Assumption of Mary and belongs to the Koper Diocese.

The poet, composer, and playwright Miroslav Vilhar (1818–1871) is buried in Knežak.