Louis I of Châtillon (d. August 26, 1346, battle of Crécy), son of Guy I of Blois-Châtillon and Marguerite of Valois, was count of Blois and lord of Avesnes 1342–1346. In 1340 in Soissons, he married Jeanne of Avesnes, Countess of Soissons (d. 1350), daughter of John of Avesnes, Lord of Beaumont. They had three children:
He was killed at the Battle of Crécy.
| Preceded by Guy I |
Count of Blois 1342–1346 |
Succeeded by Louis III |
| Preceded by Jeanne |
Count of Soissons with Jeanne 1344–1346 |
