premise: Tijuana is the largest city in Mexico.
hypothesis: Oakland, California . A major West Coast port city , Oakland is the largest city in the East Bay region of the San Francisco Bay Area , the third largest city overall in the San Francisco Bay Area , the eighth largest city in California , and the 45th largest city in the United States , with a population of 419,267 . Tijuana ( [ tiːˈwɑːnə ] ; [ tiˈxwana ] ) is the largest city in Baja California and on the Baja California Peninsula and center of the Tijuana metropolitan area , part of the international San Diego -- Tijuana metropolitan area . Tijuana is the 45th largest city in the Americas and is the westernmost city in Mexico . According to the 2010 census , the Tijuana metropolitan area was the fifth-largest in Mexico , with a population of 1,784,034 , but rankings vary , the city ( locality ) itself was 6th largest and the municipality ( administrative ) 3rd largest nationally . Tijuana metropolitan area . According to the 2005 census , the Tijuana metropolitan area was the sixth-largest in Mexico , with a population of 1,483,992 .