
South Monrovia Island
- County:
- Los Angeles County
- County Seat:
- No
- Area (mi²):
- 0.548
- State:
- California
South Monrovia Island is a CDP located in Los Angeles County, California. South Monrovia Island has a 2025 population of 6,847. South Monrovia Island is currently growing at a rate of 0.07% annually and its population has increased by 4.3% since the most recent census, which recorded a population of 6,565 in 2020.
The average household income in South Monrovia Island is $120,578 with a poverty rate of 5.96%. The median age in South Monrovia Island is 34.4 years: 31 years for males, and 36.7 years for females.