Population: 2.5 million
Diversity index: 79
Oakland was originally inhabited by the Huchiun tribe, but later the Spanish settled in the area. Today, the population is nearly 23 percent Hispanic or Latino, more than 20 percent Asian and more than 11 percent African-American. The city has a Chinatown neighborhood, which is actually a diverse pan-Asian area, including Chinese, Koreans and Filipinos. There are celebrations for the Chinese New Year, Dragon Boat Races, Chinatown street festival and Vietnamese Mid-Autumn or Moon festival.