You may be eligible to become a lawful permanent resident based on your family relationship with a US citizen or permanent resident (green card holder). Such family relationship may include but not limited to:
The spouse of a U.S. citizen
The unmarried child under 21 years of age of a U.S. citizen
The parent of a U.S. citizen (if the U.S. citizen is 21 years of age or older)
Unmarried sons and daughters (21 years of age and older) of U.S. citizens
Spouse and children (unmarried and under 21 years of age) of lawful permanent residents
Unmarried sons and daughters (21 years of age and older) of lawful permanent residents
Married sons and daughters of U.S. citizens
Brothers and sisters of U.S. citizens (if the U.S. citizen is 21 years of age and older).