
Monrovia
- County:
- Frederick County
- County Seat:
- No
- Area (mi²):
- 2.245
- State:
- Maryland
Monrovia is a CDP located in Frederick County, Maryland. Monrovia has a 2025 population of 3,621. Monrovia is currently growing at a rate of 6.28% annually and its population has increased by 132.71% since the most recent census, which recorded a population of 1,556 in 2020.
The average household income in Monrovia is $252,132 with a poverty rate of 0%. The median age in Monrovia is 39.4 years: 39.5 years for males, and 39.4 years for females.