Permanent residents (Green Card holders) wishing to become naturalized citizens must complete an application, attend a citizenship interview, and take the Oath of Citizenship to become naturalized citizens. You can obtain a complete Guide to Naturalization from the USCIS website. Basic Citizenship information is listed below. First an application form must be filed. The naturalization application form (N400 form) is 10 pages long, and needs to be filed with the USCIS office responsible for processing N400 forms for your state. A complete list of states and processing centers is available at the USCIS website. Total filing fees of $675 are due when your N400 form is filed. These fees are reduced for applicants over the age of 75, and waived entirely for military applicants filing under Section 328 and 329 of the INA. A citizenship interview is the next part of the naturalization process, and gives the USCIS agent the opportunity to get to know you. You will need to attend the interview in person. The interview also helps confirm that your application and reason for wanting to become a citizen are valid. The Naturalization Oath Ceremony is the final step to becoming a naturalized citizen. In some cases, you will be able to take the oath immediately following your interview. Otherwise, the USCIS will notify you by mail of the time and date of your ceremony, and it is imperative that you attend.