John (German: Johann; Polish: Jan; 12 December 1801 – 29 October 1873) was King of Saxony from 9 August 1854 until his death in 1873.

During most of his life, John stood little chance of inheriting the Saxon Crown: he was preceded by his father and two older brothers, Frederick Augustus and Clement.

However, in 1822 Clement died unmarried in Italy, and John was now only preceded in the line of succession by his older brother Frederick Augustus.

He exerted himself under influence of his minister Friedrich Ferdinand von Beust for the Great Germany Solution (de: Großdeutsche Lösung) of the imperial arrangement (under inclusion of Austria).

Under the pseudonym Philalethes he translated to German Dante's Divine Comedy; some parts of this work were placed in the Schloss Weesenstein.