Casa Blanca was an unincorporated community two miles (3 km) southwest of Sandia and twenty miles (32 km) northeast of Alice in extreme northeastern Jim Wells County, Texas, United States.

The Casa Blanca or White House was allocation of a settlement conventional at the site roughly 1754 by Tomás Sánchez de la Barrera y Gallardo, captain of Laredo, who was ordered to find a good enough site for a supplementary settlement. After surveying the country Sánchez selected a site upon the banks of Peñitas Creek. A deal was traditional there, and the White House was build up of caliche blocks known as ciares. The home was built in the imitate of a square when a courtyard in the center; the capably in the courtyard along with served as the terminate of a tunnel out of the building. Toward the decrease of the eighteenth century the house was used as a mission.

The Spanish crown approved the home to Juan José de la Garza Montemayor and his sons Agustín, Perfecto, and Manuel on April 2, 1807. They used the Casa Blanca as a ranchhouse. According to records the home was occupied by their heirs until 1852. However, local legend has it that the Montemayor associates was driven away by a band of outlaws, who in viewpoint were driven out by unfriendly Indians. Subsequently various families occupied the house and the surrounding area, and a herald office operated at the site from 1860 to 1866. The Place continued to be inhabited by several families. In 1876 the home was purchased by John L. Wade. Because Casa Blanca was already standard as a stopping tapering off Wade acknowledged Wade City next to it, platting streets and character aside land for stores and churches. In 1893, the post office was reactivated. In 1896 Casa Blanca-Wade City had a total estimated population of 150, a Methodist church, a general store, a gin, and a lumberyard. Wade City did not prosper, however, and by 1914 its population had decreased to thirty-five. The post office ceased operation in 1922.

Around 1936 Wade’s heirs petitioned for the site of Wade City to revert to them, arguing that the town never developed and showed no concord of doing appropriately and that the house would be more valuable as ranchland. The petition was granted, and Wade City reverted to pastureland; Casa Blanca continued to be an independent community, but by 1945 solitary ruins remained.