[6] Located about 25 miles (40 km) southwest of the Ohio capital of Columbus, London was established in 1811 to serve as the county seat.

Soon after the village was platted in the early 1810s, a Methodist church was founded in the community.

In the early 1900s, the church added facilities for the storage of human milk to sustain the orphanage it then operated.

[7] According to the United States Census Bureau, the city has a total area of 8.45 square miles (21.89 km2), all land.

There were 4,410 housing units at an average density of 521.9 per square mile (201.5/km2).

There were 3,848 housing units at an average density of 452.3 per square mile (174.6/km2).

The county's weekly newspaper, The Madison Messenger, is also headquartered in London.

There is a local Country radio station, ReadyFM (WCYC-LP, 105.1 FM), operating out of the town's old armory, just across from St. Patrick Church.

The district partners with other local educational programs, including the Tolles Technical Center.

There is also a private school run by St. Patrick Church serving preschool through 8th grade.