Yes, in many cases, you may reapply. If you reapply, you will need to
complete and re-file a new
US Citizenship Application Form, Form N-400, and pay
the fee again. You will also need to have your fingerprints and photographs
taken again. If your application is denied, the denial letter should indicate
the date you may reapply for Citizenship. If you are denied because you failed
the English or Civics test, you may reapply for Naturalization as soon as you
want. You should reapply whenever you believe you have learned enough English
or Civics to pass the test.