It lies mostly in the Hořovice Uplands, only the northwestern part of the municipal territory extends into the Prague Plateau.

The highest point is the Babka hill at 364 m (1,194 ft) above sea level.

The town is situated on the left bank of the Berounka River.

The present-day town is made up of three historical parts: Horní Černošice, Dolní Mokropsy and Vráž.

[2] Černošice was heavily damaged during the Thirty Years' War in 1639 when it was burnt to the ground by the Swedish army moving towards Prague.

[6] The main landmark of Černošice is the Church of the Assumption of the Virgin Mary.

[7] The English book The Twelve Little Cakes by Dominka Dery was written about the life of a dissident family during the Communist times in Černošice.