Age: You must be at least 18 years old to apply.

Permanent resident status: You need to have held a green card for at least five years. However, if you’re married to a U.S. citizen, this period is reduced to three years.

Physical presence: You must have been physically present in the U.S. for at least half of the five (or three) years of your required permanent residence.

Character: You need to have demonstrated good moral character, which generally means a clean criminal record and a history of honesty and trustworthiness in your dealing with others.

English proficiency: You must be able to read, write, and speak English.

Knowledge of U.S. government and history: You’ll need to pass a U.S. government and history test, which shows that you understand and appreciate the nation’s history, values, and government.