Reynosa–McAllen

Reynosa–McAllen, also known as McAllen–Reynosa, or simply as Borderplex, is one of the six international conurbations along the Mexico–U.S border. The city of Reynosa is situated in the Mexican state of Tamaulipas, on the southern bank of the Rio Grande, while the city of McAllen is located in the American state of Texas, directly north across the bank of the Rio Grande. This area has a population of roughly 1,500,000, making it the largest and most populous in the state of Tamaulipas, and third most populous on the US–Mexico border.

The Reynosa–McAllen area has been one of the fastest-growing urban areas in the United States in recent years.

Municipalities and counties

 * Reynosa Municipality
 * Río Bravo Municipality
 * Hidalgo County, Texas

Communities
''Note: Principal cities are bolded.

Cities in Mexico

 * Reynosa
 * Río Bravo
 * Nuevo Progreso

Census-designated places
Note: All census-designated places are unincorporated.

Unincorporated places

 * Hargill, Texas
 * El Gato, Texas
 * Runn, Texas
 * Val Verde, Hidalgo County, Texas