Generally, to become a U.S. citizen, you must hold a green card for at least five years. Spouses of U.S. citizens have to wait three years. There are a number of other requirements for becoming a U.S. citizen in addition to obtaining a green card, including physical presence in the country.

To become a U.S. citizen in Colorado, you must meet several requirements, including holding a green card for a set amount of time and living at a registered residence. You also must be at least 18 years old, have good moral character, basic proficiency in the English language, pass a civics test, and be willing to serve in the military if called.

The two main options for appealing a citizenship decision include filing an administrative appeal or re-filing for naturalization. To file an administrative appeal, you should already have a solid legal basis and consider providing new evidence to support your appeal. Re-filing for naturalization is preferable if the reasons for your denial can be addressed, such as failing to meet the continuous residency requirement.