| Prince John August | |
|---|---|
 | |
| Born | 17 February 1704 Gotha |
| Died | 8 May 1767 (aged 63) Stadtroda |
| Spouse | Countess Louise Reuss of Schleiz |
| Issue | Augusta, Princess of Schwarzburg-Rudolstadt Louise, Duchess of Mecklenburg-Schwerin |
| House | House of Saxe-Gotha-Altenburg |
| Father | Frederick II, Duke of Saxe-Gotha-Altenburg |
| Mother | Magdalene Augusta of Anhalt-Zerbst |
Johann August of Saxe-Gotha-Altenburg (17 February 1704 – 8 May 1767), was a German prince, member of the House of Saxe-Gotha-Altenburg.
He was born in Gotha, the fifth but second surviving son of Frederick II, Duke of Saxe-Gotha-Altenburg and Magdalene Augusta of Anhalt-Zerbst.