During the Trienio Liberal (1820 - 1823) and taking advantage of the just arrived liberalism, a process for getting an own local government was carried out and turn out in success but after this period, when the political system corresponding to the previous politic regime to the French Revolution was instituted, the local government was eliminated and the territory was part of the municipality of Murcia again. After the death of Ferdinand VII, the political regime corresponding to the previous eras to the French Revolution was removed and the liberalism was reestablished. In the context of this situation, San Pedro achieved its own local government again on 16 September 1836.