Cork Prison (Irish: Príosún Chorcaí) is an Irish penal institution on Rathmore Road, Cork City, Ireland. It is a closed, medium security prison for males over 17 years of age. As of 2022, it had a bed capacity of 296 and the daily average number of resident inmates was 262. It is immediately adjacent to Collins Barracks and near the Glen area of the city.

While the current prison facility was built and opened as a €45m development in 2016, it replaced an existing 19th century prison facility on the same road.

In 1806 a military barracks was opened by the British Government on Rathmore Road, Cork City, the new complex included a Detention Barracks for use by the military.

In 1916, during a round-up following the Easter Rising, the RIC went to arrest the nationalist Kent family at their home in Castleyons, County Cork. The family resisted and in an ensuing shoot-out, Richard Kent and Constable William Rowe were killed. The following week Thomas Kent was convicted of the murder of Constable Rowe. He was executed and buried at the military prison of Victoria Barracks (now Cork Prison).

During the Irish War of Independence a number of executions were carried out at the prison and nearby barracks. Following independence in 1922, the barracks and the associated prison were taken over by the Irish Government and the complex was renamed Collins Army Barracks.

The detention barracks remained in the possession of the Irish Army until 1972.

The military prison buildings, previously part of the broader barracks, were handed over to the Department of Justice for use as a civil prison. Collins Barracks itself remained in the control of the Irish Army, with the prison facility serviced with separate access via Rathmore Road.

The prison facility opened as a committal prison after considerable refurbishment in 1983.