It depends on your age, immigration status and what country your siblings are from. For siblings sponsorship, only U.S. citizens aged over 21 is eligible to sponsor their foreign siblings to the United States. Siblings of U.S. citizens are under the 4th preference categories with the average wait time of 7 to 12 years. If your siblings are nationals of countries that subscribe a substantial number of green card applications like India, the Philippines, Mexico, the average wait time is much longer and has been average between 17 to 22 years from the time an immigrant visa (I-130) is filed.