citizenship. Loading Unsubscribe from KateLalit? US Citizenship Interview Practice | Naturalization Simulated Mock Interview. Detention and Deportation Officer. USCIS Updates Projected Naturalization Processing Times USCIS now anticipates naturalization application processing will average 10-12 months nationally by the end of September 2008 - a substantial improvement from its estimated average processing time of 16-18 months first announced last year.