| George I | |
| Landgrave of Hesse-Darmstadt | |
| Succession: | Landgrave of Hesse-Darmstadt |
| Reign: | 21 March 1567 – 7 February 1596 |
| Successor: | Louis V |
| Spouse: | Magdalene of Lippe Eleonore of Württemburg |
| Issue: | Philip Louis V, Landgrave of Hesse-Darmstadt Christine Elizabeth Mary Philip Philip III, Landgrave of Hesse-Butzbach Anne Frederick I, Landgrave of Hesse-Homburg Madeleine John Henry |
| House: | House of Hesse-Darmstadt |
| Father: | Philip I, Landgrave of Hesse |
| Mother: | Christine of Saxony |
| Birth Date: | 10 September 1547 |
| Birth Place: | Kassel |
| Death Date: | 7 February 1596 (aged 48) |
| Death Place: | Darmstadt |
George I of Hesse-Darmstadt (10 September 1547 – 7 February 1596) was the Landgrave of Hesse-Darmstadt from 1567 to 1596.
Born on 10 September 1547 in Kassel, he was the fourth son of Philip I the Magnanimous of Hesse and his wife, Christine of Saxony.
Following his father's death in 1567 Hesse was divided between his four sons. George I received the upper County of Katzenelnbogen and selected Darmstadt as his residence. He died on 7 February 1596 and the Landgraviate was passed to his son Louis.
On 17 August 1572, he married Countess Magdalene of Lippe (1552–1587). They had 10 children.
married in 1598 Princess Magdalene of Brandenburg (1582–1616)
married in 1595 Count Frederick Magnus of Erbach-Fürstenau (1575-1618)
married in 1601 Count John Casimir of Nassau-Weilburg-Gleiberg (1577–1602)
married firstly, in 1610, Countess Anna Margarethe of Diepholz (1580–1629)
married secondly, in 1632, Countess Christine Sophie of East Frisia (1600–1658)
married in 1601 Count Albert Otto of Solms-Laubach (1576–1610)
married in 1622 Countess Margarethe of Leiningen-Westerburg (1604–1667)
On 25 May 1589, he married Duchess Eleonore of Württemberg (1552–1618). They had 1 child:
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