This version of the form is not currently in use and is provided for reference only.
Download this version of USCIS Form N-400 for the current year.
USCIS Form N-400, Application for Naturalization, also known as Form N-400, is a form issued by the Department of Homeland Security Citizenship and Immigration Services (USCIS). The form is used to apply for US citizenship by means of the naturalization process. US permanent residents meeting the eligibility requirements can file the form to request citizenship.
Download the fillable PDF version of the USCIS naturalization form down below or find it on the USCIS website.