| Country | Age Limit |
| Albania | 3 years |
| Austria | 3 years |
| Belgium | 3 years |
| Bulgaria | 1 year |
| Croatia | 3 years |
| Cyprus | 2 years |
| Czech Republic | 3 years |
| Denmark | 3 years |
| Estonia | 3 years |
| Finland | 3 years |
| France | 18 months |
| Germany | 3 or 6 year |
| Greece | 3 years |
| Hungary | 1 year old |
| Ireland | 1 year |
| Italy | 6 years |
| Latvia | 4 years |
| Lithuania | 3 years |
| Luxembourg | NAP |
| Malta | 1 year |
| Netherlands | 9 months or 4 years depending on the establishments |
| Norway | Children are not allowed to live with their imprisoned parent in penal institutions |
| Poland | 3 years |
| Portugal | 5 years |
| Romania | 1 year |
| Slovakia | Children are not allowed to live with their imprisoned parent in penal institutions |
| Slovenia | 1-2 years |
| Spain | 3 years |
| Sweden | NAP |
| Switzerland | 3 years |
| Turkey | 6 years |
| UK: England and Wales | 18 month |
| UK: Northern Ireland | Children are not allowed to live with their imprisoned parent in penal institutions |
| UK: Scotland | Children are not allowed to live with their imprisoned parent in penal institutions |
Source: Aebi, M. F. & Cocco, E. (2025). SPACE I – 2024 – Council of Europe Annual Penal Statistics: Prison populations. Council of Europe.