The prison currently accommodates approximately: 2,500 adult males in three security levels: minimum, medium and close-security.

The decision was made to build the prison in London and the land, most of which was swamp, was purchased from John Ellsworth.

In 1910, honor inmates were transported from the Ohio Penitentiary to London by railway to construct the prison.

[1] The London Correctional Institution provides programs for the inmates, such as the Family Life Centers and The New Beginnings Unit.

Vocational programs include auto technology, barbering, dental lab, HVAC (heating, ventilation, and air-conditioning), web based design, animal training, and culinary arts.