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HM Prison Onley

MaleLow
Verified
Aging · 5mo ago
Sources last reviewed on

Data is aggregated from public sources and may be incomplete or out of date. Always verify with primary sources before acting on any figure. See data sources.

For families

How to send mail, money, and visit HM Prison Onley

Step-by-step guidance using the United Kingdom system — addresses, money services, visit booking, what to bring on your first visit.

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Photograph of HM Prison Onley
Photo via Wikimedia Commons

Background

HM Prison Onley is a Category C men's prison, operated by His Majesty's Prison Service. The prison is named after the lost village of Onley, which is located next to the prison. Onley Prison is in the county of Northamptonshire close to its border with Warwickshire in England. The prison is in the parish of Barby in Northamptonshire. However the postal address of the prison is Willoughby, Warwickshire, therefore most sources list the prison as in Willoughby, Warwickshire.

Source: Wikipedia article lead, CC-BY-SA.

Capacity

100

Current population

—

Occupancy

—

Year opened

1968

Operational

Figures from official sources · verified 28 May 2026 · methodology

Facility profile

Population held

Male

Opened

1968

Region

Barby

Security level

—

Death-row facility

No

Conditions

No conditions summary available yet.

Visiting

No visiting information available.

Mailing

No mailing information available.

Practical info

Contact the operator's website for inmate-specific procedures.

Known issues

No major issues documented in our database.

Contact & address

Onley Park, Barby CV23 8AP

No public contact details available.

Conditions Risk Score

Derived signal — not a judgement. How it's calculated

—
Insufficient data
We don't have enough public data on this facility to score it. Have something to add? Send us a correction.

Related facilities

All in United Kingdom →

Same country, matched on type + security level where possible.

Compared to other facilities in United Kingdom

583 peers
Capacity (beds)this: 100 · peers avg: 579 (83%)

Data completeness

36%

How many of our profile fields are populated. We surface this so families and researchers know the limits.

Sources

Cite this page

Under CC-BY-4.0. Include the URL and access date; the site is a living reference and entries can change.

APA
World Prisons. (2026). HM Prison Onley. Retrieved October 23, 2026, from https://worldprisons.com/prisons/hm-prison-onley
Chicago
"HM Prison Onley." World Prisons. Accessed October 23, 2026. https://worldprisons.com/prisons/hm-prison-onley.
BibTeX
@misc{worldprisons-hm-prison-onley,
  author = {{World Prisons}},
  title = {HM Prison Onley},
  year = {2026},
  url = {https://worldprisons.com/prisons/hm-prison-onley},
  urldate = {2026-10-23}
}