Persons may pre-register when they are 16 years old. They may not vote in an election unless they will be 18 years old by Election Day.
When registering for the first time, you must provide either a copy of your valid ID, your Colorado Driver's License number, Colorado State ID card number, or the last four digits of your social security number. The following groups are not required to provide a copy of their ID:
When registering to vote, your residence is the primary home where you live and intend to remain indefinitely, and whenever absent, have the present intention of returning. If you do not have a fixed permanent home, you may use any address that you regularly return to and have the intent to remain.
This "home base" does not need to be an actual residential address and may be any physical location, including a park, vacant lot, shelter or commercial location.
Students, military and overseas voters do not gain or lose residency because of an absence from the state. Military and overseas voters may register with his or her last known address in Colorado, even if the person no longer owns or lives in the residence.