Immigration law is governed by U.S. federal law and governs the entry into and residence of foreign nationals in the United States, as well as the deportation, or removal, of foreign nationals from the United States. Common areas of immigration law include family-based immigration, employment-based immigration, citizenship and naturalization, humanitarian-based immigration, non-immigrant visas, and removal and deportation.

Applications by Permanent Resident (Green Card Holders) for U.S. citizenship after 5 years of permanent residency (or 3 years if based on marriage to a U.S. Citizen), along with other requirements.