Tijuana:
Tijuana is the largest city of the Mexican state of Baja California, situated on the U.S.-Mexico border adjacent to its sister city of San Diego, California.
Tijuana is the westernmost city in Mexico, however, the westernmost population center is located in Isla Guadalupe. As a frontier city, it suffers from a number of development issues, most notably crime and lack of municipal services, but still displays significant economic vitality, as the most dominant regional center in northwestern Mexico.
According to the 2005 census, the Tijuana metropolitan area was the sixth-largest in Mexico, with a population of 1,483,992, and one of the fastest growing cities in Mexico.
Tijuana forms part of the San Diego-Tijuana Metropolitan Area, the total population of which has been estimated to be just over 5 million in 2009, making it the 19th largest metropolitan area in the Americas and the largest bi-national metropolitan area that is shared between US and Mexico.
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