Mansfield Correctional Institution (MANCI) is an Ohio Department of Rehabilitation and Correction mixed-security state prison for men, located at 1150 North Main Street in Mansfield, Ohio, adjacent to the property of the historic Ohio State Reformatory.

Ohio's Richland Correctional Institution is also located in Mansfield.

[2] Those inmates have since been moved to Chillicothe Correctional Institution.

In July 2013 prisoner James David Myers engineered an escape, using three ladders to scale security fences.

Four correctional employees were fired in relation to the escape, for infractions ranging from falsifying inventory documents to failing to respond to fence alarms.