World Prisons
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Korea, Democratic People's Republic of

Onsong concentration camp

Low
Verified 28 May 2026
Fresh · 1d ago

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How to send mail, money, and visit Onsong concentration camp

Step-by-step guidance using the Korea, Democratic People's Republic of system — addresses, money services, visit booking, what to bring on your first visit.

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Background

The Onsong concentration camp was an internment camp in Changpyong, Onsong County, North Hamgyong, North Korea. It housed approximately 15,000 political prisoners. The camp was officially known as Concentration Camp (Kwan-li-so) No. 12. Although information about the camp is scarce, two defectors have alleged the forcible suppression of a large riot in May 1987 at the camp.

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

Capacity

Current population

Occupancy

Year opened

Operational

Facility profile

Operator

Population held

Mixed/unknown

Opened

Region

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

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Insufficient data
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Data completeness

16%

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

Sources