Johann Leopold, Hereditary Prince of Saxe-Coburg and Gotha (in German: Johann Leopold William Albert Ferdinand Viktor; 2 August 1906 – 4 May 1972) was the eldest son of Charles Edward, Duke of Saxe-Coburg and Gotha, and Princess Victoria Adelaide of Schleswig-Holstein-Sonderburg-Glücksburg.

Johann Leopold was born 2 August 1906 at Callenberg Castle in Coburg as the eldest son of Charles Edward, Duke of Saxe-Coburg and Gotha, and Princess Victoria Adelaide of Schleswig-Holstein-Sonderburg-Glücksburg.

He was heir-apparent, from his birth, until the forced abdication of his father on 18 November 1918, to Saxe-Coburg and Gotha.

As a youth in Germany's politically unsettled post-World-War-I period Johann Leopold was involved in right wing paramilitary activity supported by his father.

[1] Charles Edward hoped to arrange a marriage between Prince Johann Leopold and Princess Juliana, heir presumptive to his first cousin Queen Wilhelmina of the Netherlands.