Step 1: Submit an Application
To apply for naturalization you must submit an Application  for Naturalization (N-400) to  the United States Citizenship and Immigration Services (USCIS).  You can download  the N-400  from the USCIS website. For help filling out an N-400, check out these helpful  N-400 instructions  or attend one of our Florida New Americans Citizenship  Clinics. We  recommend that you fill out a practice N-400 to the best of your ability to  bring to the clinic; it makes the process go much faster.

Step  2: Fingerprinting
Approximately  two or three months after you send the application to USCIS, you will receive a  notice for an appointment to be fingerprinted.

Step 3: Interview and Citizenship Test
After they get your fingerprints, USCIS will schedule your interview. During this  interview, the examiner will question you about the information on your
naturalization application (N-400), and test your English and knowledge of U.S.  history and government.

See  a list of typical questions on the citizenship exam with answers.

Apply for citizenship now before the test gets harder! If you are denied citizenship  in the first interview, you can have a second interview.

Step  4: Oath Ceremony
Congratulations!  Your application has been approved and you are ready to become a  Citizen! Once  your application is approved, you will receive a notice from USCIS to attend an Oath ceremony to obtain your certificate of naturalization.
Important!  USCIS will notify you as to where and when your Oath ceremony will take place. In some  cases you will be given your ceremony date the same day you pass your interview  exam. For  more information on the Oath Ceremony from USCIS click Here.

Step  5: Register to Vote!
At  this point, you will be a U.S. citizen! That  means that you will be able to apply for a U.S. passport and register to vote in  U.S. elections. You could even be one of the candidates, as only U.S. citizens  are able to hold elected public office.
Citizens  have full rights and protections under the United States Constitution.  Non-citizens, even lawful permanent residents with long term residency in the 
United States, may face the loss of their status under certain  circumstances resulting from changes in immigration law.