The dept. of homeland security’s citizenship and immigration services (USCIS) wing decides on all immigration cases except asylum applications. The federal agency receives applications from inside and outside the country. To process immigration applications, and provide information and other services, there are field offices in different population centers across the U.S.
As an immigration hopeful, you are supposed to visit the field office nearest to you for an in-person interview. In some cities and states, this is a straightforward thing because there’s only one field office there. In other States, however, there are multiple offices. To find the nearest location, you can provide your zip code to the online office locator search engine of the USCIS.