Information on custodial sentences and execution of adult sanctions
The number of inmates is measured on a given date (reference day). This survey on custodial sentences and pre-trial detention is conducted every year on 31 January in the cantonal penal institutions of the justice and police departments. These are inventory statistics providing a snapshot at a given moment in time of the number of persons in detention.
The number of incarcerations is different from the number of inmates. This is the number of persons admitted to a custodial sentence over a twelve-month period. By extension, the number of releases is the number of person who finish their custodial sentence in a given year. These are flow statistics on the execution of sanctions, providing a longer-term view of the movements of detained persons and which, by calculating the time that has elapsed between admission and release, provides the length of imprisonment.
Detainees under custodial sentences and measures
Type of sentence
In-patient therapeutic measures
Reason of release
Parole (conditional release)
Mean of the length of stay (in days)
State of the database: 27.10.2021
Source: FSO - Statistics on the execution of sanctions
Detainees according to type of detention on reference day
Remand and preventive detention on reference day
Remand and preventive detention can be ordered by the responsible authority when strong suspicion exists that the accused has committed a felony or misdemeanour and they are likely to flee, collude or reoffend (cf. Art. 221 Swiss Criminal Procedure Code - CPC 312.0).