U.S. Citizens can petition to immigrate their: parents, brothers, sisters, and the children of their brothers and sisters to the United States. The processing time for siblings and their children can take up to 5 years. For parents the processing times currently average 9-12 months.
Upon arrival in the United States your family members will automatically receive green cards and become Legal Permanent Residents. In order to qualify financially to sponsor a family member to immigrate to the United States, the visa petitioner must meet a minimum income requirement based on family size. If the petitioner can not meet the minimum income requirement, a co-sponsor can be added.