Monrovia is a town in Monroe Township, Morgan County, in the U.S. state of Indiana.

[7] The Lake Ditch Bridge was listed on the National Register of Historic Places in 2001.

[8] The town is the subject of the well-regarded Frederick Wiseman documentary, Monrovia, Indiana, released in October 2018.

[10] Indiana State Road 42 passes through the center of town as Main Street, while State Road 39 passes through the center on Chestnut Street.

Interstate 70 passes 2 miles (3 km) north of Monrovia, with access from Exit 59 at SR 39.

[1] The town sits on a low ridge which drains east toward Sycamore Creek and north toward McCracken Creek, both of which flow toward the White River; to the west the town drains toward Mill Creek, a tributary of the Eel River, which in turn flows to the White River.

16.4% of all households were made up of individuals, and 4.6% had someone living alone who was 65 years of age or older.

16.7% of all households were made up of individuals, and 5.6% had someone living alone who was 65 years of age or older.