The Kingdom of León is an independent kingdom situated in the northwest region of the Iberian Peninsula.

It is founded in 910 when the Christian princes of Asturias along the northern coast of the peninsula shift their capital from Oviedo to the city of León.

The County of Portugal separates to become the independent Kingdom of Portugal in 1139 and the eastern, inland part of León is joined to the Kingdom of Castile in 1230.From 1296 to 1301, the Kingdom of León is again independent and after the reunion with Castile remains a kingdom until 1833, but as part of a united Spain.

In the Royal Decree of November 30, 1833, the Kingdom of León is considered one of the Spanish regions and divided into the provinces of León, Zamora and Salamanca.

In 1978, these three provinces of the region of León are included along with six provinces of the historic region of Old Castile to create the autonomous community of Castile and León.