Most au pairs are between 18 and 30 years old. As au pair visa regulations regarding age differ from country to country, please check the list below for information on au pair age in the various host countries.
| Australia | 18 - 30 years old |
| Austria | EU: 18 - 28 / Non-EU: 18 - 27 years old |
| Belgium | 18 - 25 years old |
| Canada | 18 - 30 years old |
| Denmark | 18 - 29 years old |
| Finland | 17 - 30 years old |
| France | 17 - 30 years old |
| Germany | EU: 17 - 30 / Non-EU: 18 - 26 years old |
| Iceland | 18 - 25 years old |
| Ireland | 18 - 30 years old |
| Italy | EU: 17 - 30 / Non-EU: 18 - 30 years old |
| Luxembourg | 18 -30 years old |
| Netherlands | 18 - 30 years old |
| New Zealand | 18 - 30 years old |
| Norway | 18 - 30 years old |
| South Africa | 18 - 24 years old |
| Spain | 17 - 30 years old |
| Sweden | 18 - 30 years old |
| Switzerland | EU: 17 - 30 / Non-EU: 18 - 25 years old |
| United Kingdom | 17 - 30 years old |
| USA | 18 - 26 years old |