John I de Montfort (c. 1228 – 1249), Count of Montfort from 1241 to 1249, was the son of Amaury de Montfort, Count of Montfort, and of Béatrice of Burgundy.

[1] In 1248 he joined Louis IX's crusader fleet.

[2] Once the fleet arrived at Limassol, it was scattered by fierce storms and was forced to wait there to regroup.

[2] John died of sickness, while awaiting the rest of Louis's forces in Cyprus.

[2] In March 1248 he married Jeanne de Châteaudun,[3] Dame of Château-du-Loir, daughter of Geoffrey VI, Viscount of Châteaudun, and of Clémence des Roches.