Processing immigration cases of non-asylum seekers are the responsibility of the U.S. Citizenship and Immigration Services (USCIS). For this purpose, the federal agency has field offices across the country and abroad.
It’s important to note here that a field office is not the only option you have to submit your application. In fact, the USCIS accepts online applications for many different types of immigration matters, including naturalization, petition for alien relatives, replacement of permanent resident cards, etc.
The field office in your area of residence is where your naturalization interview and test will take place. However, field offices can transfer part of your case processing to another office. This may mean that you receive a notice from another office, but it won’t affect where’s your biometric will take place. A field office is also where your naturalization ceremony – the final step of naturalization – will take place.