Reynosa–McAllen,[1] also known as McAllen–Reynosa,[2] or simply as Borderplex,[3] 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.

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

[6] Note: Principal cities are bolded.

Note: All census-designated places are unincorporated.