HMP Grendon
Grendon is a men’s prison in the village of Grendon Underwood, Buckinghamshire. It is jointly managed with Spring Hill Prison, which is on the same site.
- Category
- Category not recorded
- Holds
- Not recorded
- Operator
- HMPPS
- Region
- South East, England
- Address
- HMP Grendon Grendon Underwood Buckinghamshire HP18 0TL
- Telephone
- 01296 445 243
- GOV.UK page
- Visiting, sending money and contact details
Population over time
| Date | Held | Certified normal | Occupancy |
|---|---|---|---|
| 28 Aug 2026 | 486 | 621 | 78.3% |
| 24 Aug 2026 | 489 | 621 | 78.7% |
| 29 Jun 2026 | 508 | 621 | 81.8% |
Deaths in custody
The Prisons and Probation Ombudsman investigates every death of a person in custody and publishes a report once the inquest has concluded. Only the title and date are held here; the reports themselves are on the Ombudsman's site and can be distressing to read.
- Fatal incident investigation — prison, January 2024
Prisons and Probation Ombudsman · 8 Aug 2025
Inspections, reports and announcements
- HMP Grendon
HM Inspectorate of Prisons · 14 Aug 2023
- HMP Grendon
HM Inspectorate of Prisons · 13 Apr 2021
Record last refreshed 27 Oct 2026. Source: GOV.UK and HM Inspectorate of Prisons, under the Open Government Licence v3.0.