Nižbor (German: Nischburg) is a municipality and village in Beroun District in the Central Bohemian Region of the Czech Republic.

It lies in the Křivoklát Highlands, in the Křivoklátsko Protected Landscape Area.

The highest point is the hill Lísek at 483 m (1,585 ft) above sea level.

In 1731, the Waldsteins sold the Křivoklát estate with Nižbor to the Fürstenberg family, who owned it until 1929.

The burial ground of the Fürstenberg family with a number of sepulchral objects was built from 1787 until the mid-19th century.