1. Overview
As a permanent resident, you can apply to become a U.S. citizen after a certain period of time. Citizens have the right to vote, and unlike permanent residents, there are no restrictions on residency and no risk of deportation even if they have a criminal record.

2. Qualifications
Adults 18 years of age or older can apply for citizenship if they have maintained their status as a permanent resident for 3 years (marriage through green card) or 5 years (work green card and most other cases). To apply, you must have been physically present in the U.S. for at least 30 months (2.5 years), and you must have been a permanent resident of the U.S. for more than 6 months without staying abroad for an extended period of time.