The Prussian House of Lords in Berlin was the upper house of the Landtag of Prussia, the parliament of Prussia from 1850 to 1918. Together with the lower house, the House of Representatives, it formed the Prussian bicameral legislature. The building is now used as the seat of the German Bundesrat.

An upper house is one of two chambers of a bicameral legislature, the other chamber being the lower house. The house formally designated as the upper house is usually smaller and often has more restricted power than the lower house. A legislature composed of only one house is described as unicameral.