The twin cities of Laredo , Texas and Nuevo Laredo, Mexico, which celebrated their 250th anniversary in 2005, are situated on the banks of the Rio Grande. Laredo, which has a population of 207,787, has been governed under seven national flags. Nuevo Laredo has a burgeoning population of 355,827. The twin cities are collectively referred to as Los Dos Laredos. The weather is moderate in winter months around 68°F (20°C) but sizzling in mid-summer around 100°F (39°C).
Founded in 1755, Laredo grew from a village to the capital of the brief Republic of the Rio Grande to the largest inland port on the Mexico–United States border. Laredo's economy is based on international trade with Mexico. Many major transportation companies have a facility in Laredo. The city is on the southern end of I-35 which makes it close to the manufacturers in northern Mexico. It has four international bridges and one railway bridge. According to the 2010 census, the city population was 236,091, making it the tenth-most populous city in the state of Texas and third-most populated on the Mexico–United States border, after San Diego, California, and El Paso, Texas. Its metropolitan area is the 178th-largest in the U. S. and includes all of Webb County, with a population of 250,304. Laredo is also part of the cross-border Laredo-Nuevo Laredo Metropolitan Area with an estimated population of 636,516. Because Laredo is 95. 6 percent Hispanic and Latino, it is one of the least ethnically diverse cities in the United States.