Del Rio is a border city in and the county seat of Val Verde County, Texas, United States. Del Rio is connected with Ciudad Acuña via the Lake Amistad Dam International Crossing and Del Río-Ciudad Acuña International Bridge. Del Rio is also home to Laughlin Air Force Base, the busiest pilot training base in the United States Air Force.

Del Rio is the principal city of the Del Rio Micropolitan Statistical Area, which includes all of Val Verde County; the micropolitan area had an estimated population of over 50,000 in 2007. Located across from Del Rio, in the Mexican state of Coahuila, is the city of Ciudad Acuña with a city population of 209,000. 

Source: http://en.wikipedia.org