Family Based Immigration
There are five ways to immigrate to the United States through family relationships. These family immigration visas are petitioned by U.S. citizen or permanent residents for their relatives. They are listed below:
Immediate Relative of U.S. Citizens:
Spouses, parents, and children (unmarried and under 21 years old) of U.S. citizens are immediate relatives. There is no numerical limitation on the number of immediate relative of U.S. citizens.
Unmarried sons and daughters of U.S. citizens.
There are two preferences in this group. Preference 2A includes spouses and unmarried children (under 21) of permanent residents. Preference 2B includes the rest of current second preference category: unmarried adult sons and daughters of permanent residents.
Married sons and daughters of U.S. citizens.
Brothers and sisters of citizens.