|According to The Western Hemisphere Travel Initiative as of December 31st, 2008 you must have a passport to travel to Mexico. Your U.S. Drivers license will no longer be accepted for re-entry into the United States.
United States Passport Information
The Passport Services Office provides information and services to American citizens about how to obtain, replace or change a passport. A passport is an internationally recognized travel document that verifies the identity and nationality of the bearer. A valid U.S. passport is required to enter and leave most foreign countries. Only the U.S. Department of State has the authority to grant, issue or verify United States passports.
New Application for a U.S. Passport
To obtain a passport for the first time, you need to go in person to one of 7,000 passport acceptance facilities located throughout the United States with two photographs of yourself, proof of U.S. citizenship, and a valid form of photo identification such as a driver’s license.
Passport Acceptance Facilities
Acceptance facilities include many Federal, state and probate courts, post offices, some public libraries and a number of county and municipal offices. There are also 13 regional passport agencies, and 1 Gateway City Agency, which serve customers who are traveling within 2 weeks (14 days), or who need foreign visas for travel. Appointments are required in such cases.
How do I apply for a U.S. Passport
You’ll need to apply in person if you are applying for a U.S. passport for the first time; if your expired U.S. passport is not in your possession; if your previous U.S. passport has expired and was issued more than 15 years ago; or if your previous U.S. passport was issued when you are under 16 your currently valid U.S. passport has been lost of stolen.
For more information on getting a new passport, please click How to get a passport.
Renewal of a U.S. Passport
You can renew by mail if: Your most recent passport is available to submit and it is not damaged; you received the passport within the past 15 years; you were over age 16 when it was issued; you still have the same name, or can legally document your name change. If your passport has been, altered or damaged, you cannot apply by mail. You must apply in person.
For more information on how to renew a passport, please click: How to renew a passport.