Most hostels require that guests be at least 18 years old or they must be accompanied by a parent/guardian/chaperone. With the exception of the Bavarian region of Germany, there are no upper age restrictions at most hostels.

In 2026, the standard minimum age to stay in a hostel in Europe independently is 18 years old. Most major hostel chains (like Generator, Wombat’s, or St Christopher’s) require guests to be of legal adulthood to stay in "shared dormitories" for safety and insurance reasons. However, many hostels allow minors (ages 16–17) to stay if they are accompanied by a legal guardian or have a notarized parental consent form, though they are usually restricted to private rooms rather than shared dorms. For "youth hostels" specifically geared toward schools (like those in Germany's DJH network), the rules are more flexible for younger teens in groups. Conversely, some "party hostels" in cities like Budapest or Prague enforce a strict 18+ or even 21+ rule and do not allow children at all. Always check the "House Rules" on the hostel's website before booking, as being turned away at the door is a common and unfortunate occurrence for under-18 travelers.