Arcadia is a city in Los Angeles County, California, United States located about 13mi northeast of downtown Los Angeles in the San Gabriel Valley and at the base of the San Gabriel Mountains.It is the site of the Santa Anita Park racetrack and home to the Los Angeles County Arboretum and Botanic Garden. The city had a population of 56,364 at the 2010 census, up from 53,248 at the 2000 census. The city is named after Arcadia, Greece.In 2012, Arcadia was ranked 7th in the nation on CNN Money magazine's list of towns with highest median home costs.Arcadia's Upper Rancho neighborhood was ranked the 23rd richest neighborhood in Southern California by Business Insider in 2014; out ranking Orange County's Newport Beach with a median household income of $310,779.In 2010, Bloomberg Businessweek named Arcadia as one of the "Best Places to Raise Your Kids: 2010" for the second year in a row.GeographyLocated northeast of downtown Los Angeles, Arcadia is bordered by six other communities: Pasadena, Sierra Madre, El Monte, San Marino, Monrovia, and Temple City.According to the United States Census Bureau, the city has a total area of 11.1sqmi. 10.9sqmi of it is land and 0.2sqmi of it (1.87%) is water.