List of place names of Spanish origin in the United States
As a result of former Spanish and, later, Mexican sovereignty over lands that are now part of the United States, there are many places in the country, mostly in the southwest, with names of Spanish origin. Florida and Louisiana also were at times under Spanish control, as were California, Utah, Nevada, Arizona, New Mexico, Texas, and portions of western Colorado.
Source: Wikipedia — List of place names of Spanish origin in the United States (CC BY-SA 4.0)