No, if you are traveling from America. The outlets in Mexico are the same as in the U.S. But, keep in mind that you might not find very many three-prong outlets here in Mexico. For this reason, a converter may be helpful, but it's certainly not necessary. If you are traveling from the UK and Europe, you will need one. Mexico has two prong outlets, and sometimes three-prong outlets, that are different than what you have in the UK and Europe.