Its former area currently comprises the Mexican state of Baja California, located in the northern part of the Baja California peninsula.

[1][4] Beginning in 1939, several political groups that promoted the conversion of the Baja territory into a state of Mexico were created.

On 15 November 1951, President Miguel Alemán Valdés sent Congress a proposed amendment to Articles 43 and 45 of the constitution to transform the Territory of Baja California Norte into the Free and Sovereign State of Baja California.

The decree was approved on 31 December 1951 and was published in the Official Journal of the Federation on 16 January 1952.

The last territorial governor, Alfonso García González, was appointed provisional governor of the newly created state.