Spouses, parents or children (under 21 years of age) of U.S. citizens
FIRST PREFERENCE
Unmarried sons and daughters (over 21 years of age) of U.S. citizens
SECOND PREFERENCE
Spouses and unmarried children (under 21 years of age) of permanent residents
Unmarried sons and daughters (21 and over) of permanent residents
THIRD PREFERENCE
Married sons and daughters (over 21 years of age) of U.S. citizens
FOURTH PREFERENCE
Brothers and Sisters of U.S. citizens
GENERAL INFORMATION
Those who receive their residence based upon a marriage of less than two years receive "conditional residence" for two years and must file a petition for removal of conditions ninety days before the two years expires.
Stepchildren are included if the marriage that created the relationship occurred prior to the child's 18th birthday.
There are waiting periods for all of the above categories except immediate relatives.