Luis de Carvajal (sometimes Luis de Carabajal y de la Cueva) (c. 1537 – 13 February 1591) was governor of the Spanish province of Nuevo León in present-day Mexico, slave dealer, and the first Spanish subject known to have entered Texas from Mexico across the lower Rio Grande.
He was a Portuguese-born, Spanish Crown officer, who in 1579 was awarded a large swath of territory in New Spain, known as Nuevo Reino de León. He was born in Mogadouro, Portugal, around 1537, but was raised in the Kingdom of León at the home of the Count of Benavente, a contemporary and friend of Philip II of Spain, who named Carvajal Governor of Nuevo Reino de León and granted him many privileges on the basis of previous services to the Spanish Crown.