I'm a US citizen and want to sponsor my sibling for a Green Card, but I'm not sure if I'm eligible.

Consult with an immigration attorney to determine the requirements.

Ensure that you meet the eligibility requirements for sponsoring a sibling.

Gather documentation of your relationship and financial stability.

Yes, U.S. citizens aged 21 or older can sponsor a sibling for a Green Card by filing Form I-130, Petition for Alien Relative.