Louis I of Spain (25 August 1707 – 31 August 1724) was the King of Spain and eldest son of Philip V of Spain and Maria Luisa of Savoy. His reign was one of the shortest in Spanish history. It is often considered unremarkable. However, his marriage to his father's cousin Louis Élisabeth d'Orléans helped the country's relations with France. His wife was a minor French princess.