About This Place
South El Monte is a city in the San Gabriel Valley, in Los Angeles County, California, United States. As of the 2010 census, the city had a population of 20,116, down from 21,144 at the 2000 census.
South El Monte is located at 34°2′56″N 118°2′54″W / 34.04889°N 118.04833°W / 34.04889; -118.04833 (34.048910, -118.048463).
According to the United States Census Bureau, the city has a total area of 2.8 square miles (7.4 km²), virtually all land.