Party Active Inactive Total*
American Constitution 280 69 349
Approval Voting 27 0 27
Democratic 95,040 7,746 102,786
Green 934 172 1,106
Libertarian 2,270 530 2,800
Republican 32,499 3,302 35,801
Unity 61 14 75
Unaffiliated 85,131 10,896 96,027
Totals 216,242 22,729 238,971

Data as of 1/1/2019

Party Active Inactive Total*
American Constitution 286 69 355
Approval Voting 31 0 31
Democratic 95,090 7,599 102,689
Green 938 165 1,103
Libertarian 2,262 515 2,777
Republican 32,436 3,209 35,645
Unity 62 13 75
Unaffiliated 85,639 10,704 96,343
Totals 216,744 22,274 239,018

Data as of 2/1/2019

Party Active Inactive Total*
American Constitution 287 66 353
Approval Voting 33 0 33
Democratic 95,085 7,539 102,624
Green 926 164 1,090
Libertarian 2,255 511 2,766
Republican 32,350 3,154 35,504
Unity 58 14 72
Unaffiliated 86,028 10,605 96,633
Totals 217,022 22,053 239,075

Data as of 3/1/2019

Party Active Inactive Total*
American Constitution 288 64 352
Approval Voting 34 0 34
Democratic 95,148 7,468 102,616
Green 917 160 1,077
Libertarian 2,261 504 2,765
Republican 32,314 3,128 35,442
Unity 61 14 75
Unaffiliated 86,533 10,489 97,022
Totals 217,556 21,827 239,383

Data as of 4/1/2019

Party Active Inactive Total*
American Constitution 289 64 353
Approval Voting 38 0 38
Democratic 95,041 7,458 102,499
Green 909 159 1,068
Libertarian 2,255 499 2,754
Republican 32,246 3,092 35,338
Unity 62 13 75
Unaffiliated 87,077 10,395 97,472
Totals 217,917 21,680 239,597

Data as of 5/1/2019

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The data on this page is updated monthly on the 1st of the month*.

Note that the voter counts reflected above do include a small percentage of voters who are under 18 at present, but may be eligible to vote by the next election. Colorado law allows residents to register to vote as young as 16. Only active voters who are age 18 on or before Election Day will be mailed a ballot. Note that “Approval Voting” became an official Colorado qualified political organization in September 2018. Voters could register with this organization only after this date.

To get the most up-to-date voter registration counts for active voters or to search breakdowns of active voters by city, gender, age, and party use our Voter Registration Counts tool.

Return to Maps & Data to see voter registration data from previous election years.

Definitions of Voter Status:
Active Status

Active voters automatically receive a mail ballot in each election. An active voter is:

  • Someone who is registered to vote and whose confirmation card or previous mail ballot was not returned as undeliverable.
  • Someone who is registered to vote and has not been identified as having moved to a different state.
  • Someone who has recently registered or updated their voter registration since the last general election.
Inactive Status

These voters do not automatically receive a mail ballot in each election. They are still eligible to vote by visiting a Voter Service and Polling Center during election time, or they can contact the Elections Division to find out more information about how to reactivate their record. Categories include:

  • Undeliverable Ballot or Returned Mail: Voters who no longer reside at the address provided on their voter registration file. Official election correspondence and/or ballot has been returned to the clerk’s office as “undeliverable” by the post office because the resident no longer lives at the address.
  • NCOA (National Change of Address database): Voters who have provided the U.S. Postal Service with new residence addresses that indicate they have moved out of the state of Colorado.

* This Voter Registration Data application was launched in October 2017. Data populated in earlier months in 2017 is approximately from the 1st of every month depending on whether the date fell on a weekday.