A driver's license or driving permit is a legal authorization, or the official document confirming such an authorization, for a specific individual to operate one or more types of motorized vehicles—such as motorcycles, cars, trucks, or buses—on a public road. Such licenses are often plastic and the size of a credit card.

In most international agreements the wording "driving permit" is used, for instance in the Vienna Convention on Road Traffic. In Australia, Canada, New Zealand, and the USA the terms "driver license" or "driver's license" are used, while in British English and in many former British colonies the term is "driving licence".

The laws relating to the licensing of drivers vary between jurisdictions. In some jurisdictions, a permit is issued after the recipient has passed a driving test, while in others a person acquires their permit or a learner's permit before beginning to drive. Different categories of permit often exist for different types of motor vehicles, particularly large trucks and passenger vehicles. The difficulty of the driving test varies considerably between jurisdictions, as do factors such as age and the required level of competence and practice.