COLORADO

Colorado will elect a Governor in 2018.

Primary Election voter registration deadline – County Clerk must receive a registration
application by June 18, 2018 for a voter to receive a ballot by mail; if an application is received after June 18, the voter will be informed that he must pick up his ballot at a 
Voter Service and Polling Center.

Primary Election date – June 26, 2018

General Election voter registration deadline – County Clerk must receive a registration
application by October 29, 2018 for a voter to receive a ballot by mail; if an application is
received after October 29, the voter will be informed that he must pick up his ballot at a Voter Service and Polling Center.

General Election date – November 6, 2018

Colorado is a vote-by-mail state – 

All registered Colorado voters will receive their ballot in the mail.  Ballots will be mailed to voters 18 to 22 days before the election.  If a voter wishes to vote in person, he must bring his mail-in ballot to a Voter Service and Polling Center during the 15-day period before Election Day (except Sundays).  

Early voting –

In person – Any voter may vote early in person, no excuse necessary.  Early in-person
voting is available at Voter Service and Polling Centers during the 15 days before the General Election (except Sundays).  

By mail – Any voter may vote early by mail, no excuse necessary.  Applications
for absentee/vote-by-mail ballots must be received by mail no later than
seven days before Election Day.  [Note:  This option is for people who can’t or don’t want to wait to receive their ballot by mail, which will be sent out between 18 to 22 days before the election.]

Applications for absentee/vote-by-mail ballots may also be obtained
in person no later than the Friday before Election Day.  Absentee ballots must be returned by Election Day.