Sion, Valais

Centre de détention administrative (CDA) de Sion

Status

In use

2025

Type: Immigration detention centre (Administrative)

Custodial Authority: Not Available

Management: Not Available

Detains: Non-immigration-related administrative detainees, Undocumented migrants (administrative)

Capacity Reported population Deaths at facility
No Data
No Data
No Data
Switzerland

3,023

Migration Detainees

2,761

Migration Detainee Entries

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Marker
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ABOUT

This administrative detention centre (Centre de détention administrative, or CDA) was opened in June 2024 on the same grounds as the Sion Prison for the purposes of detaining people with special needs as well for confining people under immigration legislation.


NEWS & TESTIMONY
2025

According to the Swiss Federal Government, the canton of Valais opened a new administrative detention centre (Centre de détention administrative, or CDA), in June 2024 on the same grounds as the Sion Prison. The CDA rep [...]

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FACILITY NAMES
Centre de détention administrative (CDA) de Sion
Location

Country: Switzerland

City & Region: Sion, Valais, Europe

Contact Information
Chem. des Roseaux 8, 1950 Sion, Switzerland

MANAGEMENT & BUDGET

Center Status
Status
Year
In use
2025
Facility type
Category
Type
Year
Administrative
Immigration detention centre
2025
National typology
Official Typology
Year
Centre de détention administrative (CDA)
2025
Operating Period
Year of entry
Year ceased
2024

DETAINEES

Categories of detainees

Name Non-immigration-related administrative detainees

2025

Name Undocumented migrants (administrative)

2025

SIZE & POPULATION

LENGTH OF DETENTION

OUTCOMES

CONDITIONS

CARCERAL INDICATORS

STAFF

SEGREGATION

CELLS

COMMUNAL SPACE & ACTIVITIES

Indoor Communal Space

Yes

2024
Hours Communal Space Accessible

2

2024

HEALTH

MONITORING & ACCESS

TELECOMMUNICATIONS

NEWS & TESTIMONY

2025

According to the Swiss Federal Government, the canton of Valais opened a new administrative detention centre (Centre de détention administrative, or CDA), in June 2024 on the same grounds as the Sion Prison. The CDA reportedly has a separate regime that officials claim is not carceral in nature and which responds to the needs of the immigration detainees as well as other detainees with special needs who must be kept separate from the regular prison population. According to a January 2025 report from Switzerland to the European Committee for the Prevention of Torture: "Les autorités valaisannes indiquent que le Centre de détention administrative (CDA) a effectivement ouvert en juin 2024, sur le même site que la prison de Sion. Cependant, il ne s'agit pas d'une extension mais d'un établissement indépendant répondant en tous points aux critères énoncés par la LEI. Durant la phase de projet, l'OFJ a validé le concept de construction du CDA. Un soin particulier a été apporté afin de réduire au maximum le caractère carcéral des locaux. Les personnes détenues bénéficient d'une liberté de mouvements accrue, des activités occupationnelles sont proposées du lundi au vendredi et les contacts avec l'extérieur sont possibles quotidiennement, que ce soit par le biais de visites, de téléphones ou de vidéoconférences."