Prison
Cardiff Prison Category and function A–D category: Not yet verified.
Predominant function (2025/26): Reception
Ministry of Justice performance classification . This describes the stated performance year, not a current A–D category or the categories of every prisoner.
Capacity and population Monthly snapshot: 24 August 2026
711 Population
777 Operational capacity
Operational capacity is the capacity reported for this prison in the same monthly bulletin.
A more recent monthly snapshot has not been verified. These dated figures have been retained.
Official monthly spreadsheet · Ministry of Justice publication
Address and location HMP Cardiff
Knox Road
Cardiff CF24 0UG Prison site locationView on the prisons map
Location information checked 13 September 2026.
Independent reports HM Inspectorate of Prisons reports 8 May 2024
Cardiff is a category B reception and resettlement prison, which at the time of our inspection, was holding 737 prisoners. It had a significant remand and unsentenced population and many prisoners were recalled, which contributed to a rapid turnover of population. Men were held in…
Read the Criminal Justice Hub summary
Official prison information