As of 2026, Greater London contains ten operational prisons. That’s the official count from the Ministry of Justice, but here’s the fun bit: only a handful sit within the historic boundaries of the City of London. Most are scattered across the outer boroughs, from Wandsworth in the south to Pentonville in the north. If you’re counting young offender institutes and secure training centres, the number creeps closer to fourteen—but we’ll stick to adult prisons for clarity.
For context, London has more inmates than many small cities have residents. The total capacity hovers around 9,000 beds, though overcrowding means actual numbers often exceed that. It’s a statistic that makes your morning commute feel a little less crowded, doesn’t it?
