Reichenstein Castle (German: Burg Reichenstein) is a castle in the municipality of Arlesheim in the canton of Basel-Land in Switzerland. It is a Swiss heritage site of national significance.
It is one of four castles on a slope called Birseck that confines the plain of the Birs river and is the sister castle to Birseck Castle.
1245-1813 the castle was a property of the Swiss noble family Reich von Reichenstein. This family hold also the Château de Landskron (France) and Inzlingen Castle (Germany).
Coordinates: 47°29′48″N 7°37′44″E / 47.496764°N 7.629007°E