Voting basics: Voting in Colorado while overseas or serving in the military
Anyone who is over 18 years old, is a U.S. citizen, and is a legal resident of Colorado can register and vote in Colorado, including voters who are serving in the military or living overseas.
Members of the military who consider Colorado to be their home but aren’t in the state due to active duty or service can still vote. Additionally, any citizen who lives overseas but had their last legal residence in the U.S. in Colorado can vote.
Dependents and spouses of active military personnel are also eligible to vote in Colorado.
Those who need to receive a ballot overseas need to update their voter registration through the Colorado secretary of state’s office to reflect their eligibility under the federal Uniformed and Overseas Citizens and Absentee Voting Act.
https://coloradonewsline.com/2024/09/11/voting-basics-voting-in-colorado-while-overseas-or-serving-in-military/