| Louis III of Anjou | |
|---|---|
 Miniature of Louis III, c. 1450 | |
| Duke of Anjou | |
| Reign | 1417–1434 |
| Predecessor | Louis II of Anjou |
| Successor | René of Anjou |
| Born | 25 September 1403 |
| Died | 12 November 1434 Cosenza |
| Spouse | Margaret of Savoy |
| House | Valois-Anjou |
| Father | Louis II of Anjou |
| Mother | Yolande of Aragon |
Louis III (25 September 1403 – 12 November 1434) was a claimant to the Kingdom of Naples from 1417 to 1426, as well as count of Provence, Forcalquier, Piedmont, and Maine and duke of Anjou from 1417 to 1434. As the heir designate to the throne of Naples, he was duke of Calabria from 1426 to 1434.