| Frederick Francis I | |
|---|---|
 Frederick Francis I, as Duke of Mecklenburg-Schwerin in swedish uniform with the Royal Order of the Seraphim. Painted by Wilhelm August Christian Abel 1803. | |
| Grand Duke of Mecklenburg-Schwerin | |
| Reign | 14 June 1815 – 1 February 1837 |
| Predecessor | Himself as Duke |
| Successor | Paul Frederick |
| Duke of Mecklenburg-Schwerin | |
| Reign | 21 April 1785 – 14 June 1815 |
| Predecessor | Frederick II |
| Successor | Himself as Grand Duke |
| Born | 10 December 1756 Schwerin, Duchy of Mecklenburg-Schwerin |
| Died | 1 February 1837 (aged 80) Ludwigslust, Grand Duchy of Mecklenburg-Schwerin |
| Burial | |
| Spouse | Princess Louise of Saxe-Gotha-Altenburg |
| Issue Among others | Frederick Louis, Hereditary Grand Duke of Mecklenburg-Schwerin Louise Charlotte, Hereditary Princess of Saxe-Gotha-Altenburg Duke Gustav Wilhelm Charlotte Frederica, Hereditary Princess of Denmark |
| House | Mecklenburg-Schwerin |
| Father | Duke Louis of Mecklenburg-Schwerin |
| Mother | Princess Charlotte Sophie of Saxe-Coburg-Saalfeld |
| Religion | Lutheranism |
Frederick Francis I (10 December 1756 – 1 February 1837) ruled over the German state of Mecklenburg-Schwerin, first as duke (1785–1815), and then as grand duke (1815–1837).