Reichenstein Castle () 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 also holds the Château de Landskron (France) and Inzlingen Castle (Germany).
See also List of castles in Switzerland
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