Del Rio is a city and the county chair of Val Verde County in southwestern Texas, United States. The city is 152 miles west of San Antonio. As of 2020, Del Rio had a population of 34,673.

The Spanish time-honored a little settlement south of the Rio Grande in present-day Mexico, and some Spaniards settled upon what became the United States side of the Rio Grande as in advance as the 18th century. Paula Losoya Taylor built the first hacienda in the Place in 1862. U.S. development upon 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 90×10^ 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 disclose of Texas in quarrel for building a canal system to irrigate the area. The developers sold tracts of estate surrounding the canals to recover their investment and produce a result a profit. The initial investors (William C. Adams, Joseph M. Hudson, John P. Grove, Donald Jackson, John Perry, Joseph Ney, Randolph Pafford, A. O. Strickland, and James H Taylor) formed the San Felipe Agricultural, Manufacturing, and Irrigation Company in 1868. The paperwork completed construction of a network of irrigation canals in 1871. Residents referred to the slowly developing town as San Felipe Del Rio because local lore said the publish came from in the future Spanish explorers who offered a deposit at the site on St. Philip’s Day, 1635.

In 1883, local residents requested a declare office be established. The United States Postal Department shortened “San Felipe del Rio” to “Del Rio” to avoid confusion gone San Felipe de Austin. In 1885, Val Verde County was organized and Del Rio became the county seat. The City of Del Rio was incorporated on November 15, 1911.