Reichenstein may refer to:

• Reichenstein, in Silesia, now Złoty Stok, Poland
• Reichenstein, in Bohemia, now Rejštejn, Czech Republic
• Reichenstein, in Zweisimmen, Bernese Oberland, Switzerland
• Lordship of Reichenstein, a lordship in the Lower Rhenish–Westphalian Circle of the Holy Roman Empire
• Golden Mountains (Sudetes), on the border of Czech Republic and Poland
• Eisenerzer Reichenstein in the Ennstal Alps, Styria, Austria, the location of the Reichenstein Smeltery
• Admonter Reichenstein in the Ennstal Alps, Styria, Austria

• Burg Reichenstein (Oberpfalz), a castle in Stadlern, Bavaria, Germany
• Reichenstein Castle (Trechtingshausen), a castle in Rhineland-Palatinate, Germany
• Reichenstein Castle (Arlesheim), a castle in Arlesheim, Basel Canton, Switzerland
• Reichenstein Castle (Westerwald), a castle in Rhineland-Palatinate
• Schloss Reichenstein, a water castle in Inzlingen, Baden-Wüttemberg, Germany

• Franz-Joseph Müller von Reichenstein (c. 1741 – c. 1825 or 1826), Austrian mineralogist
• William Reichenstein (born 1947), British sprint canoer

• Reichensteiner, a white wine grape