Pasadena, city, Los Angeles county, southern California, U.S. It is located in the San Gabriel Valley, at the base of the San Gabriel Mountains. The area was part of Rancho el Rincon de San Pasqual, a northeast section of the San Gabriel Mission (1771). The city was founded in 1874 by Thomas B. Elliott as Indiana Colony; the name Pasadena, a Chippewa word meaning “crown of the valley,” was adopted in 1875. The city’s growth as a winter resort and citrus centre was stimulated by the Santa Fe Railway, and subsequent freeway construction brought it within easy commuting distance to Los Angeles, which lies 12 miles (19 km) southwest. Its population was 137,122 at the 2010 census and an estimated 141,029 in 2019, making it the 40th largest city in California and the ninth-largest city in Los Angeles County.