Monrovia, also known as Vaughn Corners or Thompson Mill, is an unincorporated community in Madison County, Alabama, United States.

Area schools include The community is served by the Harvest-Monrovia Water and Sewer Authority.

The Madison County Sheriff's Department administers law and order in Monrovia.

Monrovia Fire/Rescue is a large volunteer fire department of approximately 81 members serving the residents of west central Madison County.

The Huntsville Madison County Public Library maintains a branch, The Monrovia Public Library, in the Monrovia Community Center on Allen Drake Dr. near Phillips Park.