
Do foreigners need to have a Los Angeles driver's license in order to rent a car in Los Angeles
For foreigners who are only visiting which have a valid driver's license from your respective country and is already over 18, there is no need for you to procure a California license. But you must provide any other identification or a valid home state license when you're planning to rent a car in Los Angeles. Just be ready to provide any other important document which might help the car rental company know you better.
http://losangeles.about.com/od/gettingaround/a/driverslicenseLA.htm
If you are planning to transfer to Los Angeles then you have to apply for a California License in order for you to drive your own car. Transferring or planning to be a resident at Los Angeles requires you to follow their laws and included there is procuring a new license under the state of California. The minimum age of applying for a drivers' license in Los Angeles is 18 years old.

