
Walnut is a city in Los Angeles County, California, United States. The population is 32,148 and its current mayor is Tony Cartagena.The area was once predominantly white. Upper-middle-class Asian immigrants have settled in Walnut, where they now form the majority of the population. As with other parts of the San Gabriel Valley, many immigrants are from Taiwan, but there is a growing affluent expatriate population from Hong Kong, Philippines and China as well. The growing amount of Asian-owned businesses - although Mainland Chinese noodle and dumpling eateries are represented - are not an uncommon sight in the area. Walnut is part of a small cluster of communities (along with Rowland Heights, California, Hacienda Heights, California, Diamond Bar, California, and Chino Hills, California) in the region with large concentrations of Asian Americans of Chinese decent. Walnut is also one of eleven cities in California that have at least 50% Asian Americans in their populations. Other cities include Alhambra, Cerritos, Daly City, Milpitas, Monterey Park, Rosemead, Rowland Heights, San Gabriel, San Marino and Union City.With exceptions to some busy intersections (such as near Mt. San Antonio College), the hilly and affluent city is considerably more relaxed in comparison to most nearby neighborhoods. The city is almost 9 square miles (23 km²) and is home to more than 32,000 people and 600 businesses. A large Sysco headquarters is located in the city.