First you must apply in person at a passport agency. You must have evidence of your citizenship, in which one of the following is acceptable: good shape u.s. passport, birth certificate that is certified, certificate of citizenship, report of birth, or naturalization certificate.
Then you must be able to present identification, in which one of the following is acceptable: u.s. passport, valid drivers license, military id, or government ID.
You must then provide 2 passport photos them both being identical, had to of been taken within the past 6 months, they have to be in color(no black and white photos will be allowed), full face photo, neat attire in photo, and 2x2 inches in size.
Your last and final step is to pay the passport fees, prices are always subject to change and vary. You might could apply for one online if you've already had a passport and get it cheaper.