United Kingdom · York
HM Prison Millsike
Data is aggregated from public sources and may be incomplete or out of date.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 Millsike
Step-by-step guidance using the United Kingdom system — addresses, money services, visit booking, what to bring on your first visit.
Background
HM Prison Millsike, situated in the East Riding of Yorkshire and opened in 2025, was built by Kier and commenced with a 10 year operational contract by Mitie Care & Custody.
Source: Wikipedia article lead, CC-BY-SA.
Capacity
—
Current population
—
Occupancy
—
Year opened
2025
Operational
Figures from official sources · verified 28 May 2026 · methodology
Facility profile
Operator
MitiePopulation held
Male
Opened
2025
Region
York
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
No public contact details available.
Conditions Risk Score
Derived signal — not a judgement. How it's calculated
Related facilities
Same country, matched on type + security level where possible.
- HMP WandsworthLondonHighLocal159% occupancy
- HMP FranklandDurhamMaximumLocal100% occupancy
- HMP BarlinnieGlasgowHighLocal147% occupancy
- HMP Cookham WoodKentHighLocal
- HMP PentonvilleLondonHighYOI137% occupancy
- HMP StyalWilmslowHighClosed female
Data completeness
30%How many of our profile fields are populated. We surface this so families and researchers know the limits.
Sources
- Wikipedia — Wikimedia Foundation
- OpenStreetMap — OpenStreetMap Contributors
- Wikidata — Wikimedia Foundation
- Wikidata (Q123577540)
- Wikipedia
- See /data-sources for our overall methodology.
Cite this page
Under CC-BY-4.0. Include the URL and access date; the site is a living reference and entries can change.
World Prisons. (2026). HM Prison Millsike. Retrieved October 25, 2026, from https://worldprisons.com/prisons/hm-prison-millsike
"HM Prison Millsike." World Prisons. Accessed October 25, 2026. https://worldprisons.com/prisons/hm-prison-millsike.
@misc{worldprisons-hm-prison-millsike,
author = {{World Prisons}},
title = {HM Prison Millsike},
year = {2026},
url = {https://worldprisons.com/prisons/hm-prison-millsike},
urldate = {2026-10-25}
}