Sierra Madre is a city in Los Angeles County, California, with a population of 11,268 at the time of the 2020 U.S. Census. The city is in the foothills of the San Gabriel Valley below the southern edge of the Angeles National Forest. Pasadena and Altadena are to its west, with Arcadia to its south and east. Sierra Madre is known as "Wisteria City", and its city seal is decorated with a drawing of the now widely known 500-foot vine. It is also called the "Village of the Foothills" and was an All-America City in 2007.