Frederick August I, Duke of Oldenburg
| Frederick Augustus I | |||||
|---|---|---|---|---|---|
| Duke of Oldenburg | |||||
| Duke of Oldenburg | |||||
| Reign | 1774–1785 | ||||
| Predecessor | Kings of Denmark as counts | ||||
| Successor | William I | ||||
| Born | 20 September 1711 Gottorp, Schleswig | ||||
| Died | 6 July 1785 (aged 73) Oldenburg | ||||
| Spouse | Princess Ulrike Friederike Wilhelmine of Hesse-Kassel | ||||
| Issue | Wilhelm, Duke of Oldenburg Princess Luise Hedvig Elisabeth Charlotte, Queen of Sweden and Norway | ||||
| |||||
| House | Holstein-Gottorp | ||||
| Father | Christian August of Holstein-Gottorp, Prince of Eutin | ||||
| Mother | Margravine Albertina Frederica of Baden-Durlach | ||||
| Religion | Protestant | ||||
Frederick Augustus I (German: Friedrich August) (20 September 1711 – 6 July 1785) was Prince-Bishop of Lübeck from 1750 to 1785, and Count and later the first Duke of Oldenburg from 1773 to 1785.