Prince Johannes Heinrich of Saxe-Coburg and Gotha-Koháry (Johannes Heinrich Friedrich Werner Konrad Rainer Maria; Slovak: Ján Henrich, Hungarian: János Henrik; 28 March 1931, in Innsbruck – 14 April 2010, in Innsbruck)[1][better source needed] was a prince of the House of Saxe-Coburg and Gotha-Koháry and the last holder of Csábrág and Szitnya, both in modern-day Slovakia, lost to the communist regime of Czechoslovakia.
He was the only son of Prince Rainer of Saxe-Coburg and Gotha by his first wife, Johanna Károlyi von Károlyi-Patty und Vasvár.
They had one daughter: Johannes Heinrich and Gabrielle were divorced on 4 July 1968.
Four months later, in Munich on 12 November 1968, Johannes Heinrich married, secondly, Princess Mathilde of Saxony, a medical doctor and granddaughter of King Frederick Augustus III of Saxony.
After the death of Johannes Heinrich, the heir to the House of Saxe-Coburg-Gotha-Koháry is the former King Simeon II of Bulgaria, due to the exclusion of Johannes Heinrich's uncle Philipp's morganatic marriage on 23 April 1944 to Sarah Aurelia Halasz, and his descendants (their only son and four grandchildren were barred from the succession).