Del Rio is a city and the county seat of Val Verde County in southwestern Texas, United States. The city is 152 miles west of San Antonio. Located within six miles of its namesake the Rio Grande, Del Rio is connected to Ciudad Acuña by the Lake Amistad Dam International Crossing and Del Río – Ciudad Acuña International Bridge. As of 2010, Del Rio had a population of 35,591. It is also home to Laughlin Air Force Base, the busiest pilot-training base in the United States Air Force.
The Spanish established a small settlement south of the Rio Grande in present-day Mexico, and some Spaniards settled on what became the United States side of the Rio Grande as early as the 18th century. Paula Losoya Taylor built the first hacienda in the area in 1862. U.S. development on the north shore of the Rio Grande did not begin until after the American Civil War.
The San Felipe Springs, about 8 mi (13 km) east of the Rio Grande on the U.S. side of the border, produces 90×106 US gal (340,000 m3) of water a day. Developers acquired several thousand acres of land adjacent to the springs, and to San Felipe Creek formed by the springs, from the state of Texas in exchange for building a canal system to irrigate the area.