| Prince Johann Adolf | |
|---|---|
 Prince Johann Adolf of Saxe-Gotha-Altenburg | |
| Born | 18 May 1721 Gotha, Duchy of Saxe-Gotha-Altenburg |
| Died | 29 April 1799 (aged 77) Friedrichstanneck, near Eisenberg, Germany |
| Burial | Chapel of Christiansburg Castle in Eisenberg |
| Spouse | Marie Maximiliane Elisabeth Schauer |
| Issue | Friedrich Adolph (von Gothart) Johanna Adolfine Friederike von Gothart Adolph Christian Carl von Gothart |
| House | Saxe-Gotha-Altenburg |
| Father | Frederick II, Duke of Saxe-Gotha-Altenburg |
| Mother | Magdalena Augusta of Anhalt-Zerbst |
Johann Adolf of Saxe-Gotha-Altenburg (18 May 1721, Gotha – 29 April 1799, Friedrichstanneck, now a district of Eisenberg, Thuringia), was a German prince of the House of Saxe-Gotha-Altenburg and a Saxon lieutenant general.