If you are a natural citizen of the United States, the following are needed for a US passport:
1. Notarized copy of your birth certificate, or the original.
2. A 2"x2" photo of yourself in a solid colored shirt against a white background. Go to your local drugstore like Walgreens or CVS for this, or Walmart.
3. About 100 USD to pay for regular processing and fees
4. A passport request form, which can be acquired at the local courthouse where you live
5. Time. Passports currently take 3-4 months on average to get processed, though sometimes you can get them back sooner.
6. ID. You will need two forms of ID when you go to turn in your passport form at the courthouse or post office.