| Frederick Francis I | |
| Succession: | Grand Duke of Mecklenburg-Schwerin |
| Reign: | 14 June 1815 – 1 February 1837 |
| Predecessor: | Himself as Duke |
| Successor: | Paul Frederick |
| Succession2: | Duke of Mecklenburg-Schwerin |
| Reign2: | 21 April 1785 – 14 June 1815 |
| Predecessor2: | Frederick II |
| Successor2: | Himself as Grand Duke |
| Spouse: | Princess Louise of Saxe-Gotha-Altenburg |
| Issue: | 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 |
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| Issue-Pipe: | Among others |
| House: | Mecklenburg-Schwerin |
| Father: | Duke Louis of Mecklenburg-Schwerin |
| Mother: | Princess Charlotte Sophie of Saxe-Coburg-Saalfeld |
| Birth Date: | 1756 12, df=y |
| Birth Place: | Schwerin, Duchy of Mecklenburg-Schwerin |
| Death Place: | Ludwigslust, Grand Duchy of Mecklenburg-Schwerin |
| Burial Place: | Doberan Minster |
| 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).
He was born in Schwerin, Duchy of Mecklenburg-Schwerin, to Duke Louis of Mecklenburg-Schwerin and Princess Charlotte Sophie of Saxe-Coburg-Saalfeld. Friedrich Franz succeeded his uncle Friedrich as duke of Mecklenburg-Schwerin in 1785.
Following the Napoleonic Wars, Friedrich Franz was raised to the dignity of grand duke at the Congress of Vienna.[1] Along with his cousin in Mecklenburg-Strelitz, he was known as one of the most reactionary German rulers. On his death in 1837 he was succeeded by his grandson, Grand Duke Paul Friedrich.
On 1 June 1775 in Gotha, Friedrich Franz married Princess Louise of Saxe-Gotha-Altenburg. They had eight children: