South El Monte is a city located in California. With a 2020 population of 20,264, it is the 298th largest city in California and the 1833rd largest city in the United States. South El Monte is currently declining at a rate of -0.76% annually but its population has increased by 0.74% since the most recent census, which recorded a population of 20,116 in 2010. South El Monte reached it's highest population of 21,144 in 2000. Spanning over 3 miles, South El Monte has a population density of 7,127 people per square mile.
The average household income in South El Monte is $65,068 with a poverty rate of 19.28%. The median rental costs in recent years comes to $1,333 per month, and the median house value is $445,500. The median age in South El Monte is 34.4 years, 33.1 years for males, and 35.6 years for females. For every 100 females there are 102.5 males.