The field offices of the citizenship and immigration service (USCIS) perform several important functions. They process the applications of non-asylum applicants and provide case-related information. Each field office has a director and the office operates under a USCIS District. There is usually more than one field office in a district. There are a total of 26 Districts, divided into four regions: Northeast, Western, Southeast, and Central.
If you have an appointment with the federal agency for an interview or another matter, the field office address will be mentioned on the notice you receive for that meeting. Note that appointments are a must in any case, so you shouldn’t expect to be able to walk in without one. If you’re looking to find the location of an office in your city or state, the USCIS office locator service is the first option you should consider. The tool gives you up-to-date information, which you may not find from other sources.