Context

You may want to create a copy of an existing list, rather than building an exactly same one from scratch.

Answer

No, you cannot directly duplicate a list. Since all lists are originated form a lead search, you can first duplicate the lead search associated to the list, then import results to create the new list.

To duplicate a lead search, follow these steps 📄 How do I duplicate a Lead Search?. This allows you to duplicate the list type and the filters while making modifications.

Import leads as in any other lead search to create a new list with exactly the same results as the previous one.