Johann Georg was the sixth of eight children and the second son of George of Saxony, the penultimate king of Saxony, and his wife Infanta Maria Ana of Portugal. The prince was raised in Dresden and received a strict Roman Catholic upbringing.

Johann Georg's early education was conducted by private teachers until 1881 when he began his military training. From 1889 through 1890, Johann Georg and his younger brother Maximilian studied law together in Freiburg im Breisgau. After switching to the University of Leipzig, Johann Georg mainly attended lectures on history and art history. In 1909, the prince received an honorary doctorate from the University of Leipzig.

In October 1902 he was sent on a mission to the various courts of Europe to announce the accession of his father King Georg to the throne four months earlier. He was received by King Edward VII in London on 12 October, and also visited Windsor Castle.^[1]

The Emperor of Austria appointed him Honorary Colonel of the 11th Infantry Regiment of the Austro-Hungarian Army in 1902, and the prince visited Vienna in January 1903 to acknowledge this honour and the good relation between the families.^[2]

Johann Georg married first to Duchess Maria Isabella of Württemberg, third child and second-eldest daughter of Duke Philipp of Württemberg and his wife Archduchess Maria Theresa of Austria, on 5 April 1894 in Stuttgart, Württemberg; they did not have children.^{[citation needed]} Maria Isabella died on 24 May 1904 at age 32 in Dresden.^{[citation needed]}

He married for a second time to Princess Maria Immacolata of Bourbon-Two Sicilies, fourth child and eldest daughter of Prince Alfonso of Bourbon-Two Sicilies, Count of Caserta and his wife Princess Antonietta of Bourbon-Two Sicilies, on 30 October 1906 in Cannes, France.^{[citation needed]} The couple did not have children.^{[citation needed]}

From 1902, Johann Georg resided at Schloss Weesenstein approximately 30 km from Dresden, high above Müglitztal. In 1918, after the end of World War I and the abdication of his brother Frederick Augustus III, Johann Georg sold Schloss Weesenstein and moved his permanent residence to Freiburg im Breisgau.

•   Kingdom of Saxony: Knight of the Order of the Rue Crown, 1881^[3]
•   Austria-Hungary:^[4]
  • Grand Cross of the Order of St. Stephen, 1891
  • Knight of the Order of the Golden Fleece, 1898
•   Baden: Knight of the House Order of Fidelity, 1905^[5]
•   Kingdom of Bavaria: Knight of the Order of St. Hubert, 1898^[6]
•   Grand Duchy of Hesse: Grand Cross of the Ludwig Order, 6 April 1892^[7]
•   Kingdom of Prussia: Knight of the Order of the Black Eagle^[8]
•   Saxe-Weimar-Eisenach: Grand Cross of the Order of the White Falcon, 1890^[9]
•   Württemberg: Grand Cross of the Order of the Württemberg Crown, 1892^[10]
•   Spain: Grand Cross of the Order of Charles III, with Collar, 20 October 1908^[11]

• Works by or about Prince Johann Georg of Saxony at Internet Archive