Party Active Inactive Total*
American Constitution 268 93 361
Democratic 89,573 14,480 104,053
Green 1,048 347 1,395
Libertarian 2,133 842 2,975
Republican 33,641 5,202 38,843
Unity 42 15 57
Unaffiliated 75,505 17,841 93,346
Totals 202,210 38,820 241,030

Data as of 1/1/2018

Party Active Inactive Total*
American Constitution 269 92 361
Democratic 90,203 14,369 104,572
Green 1,009 345 1,354
Libertarian 2,146 841 2,987
Republican 33,606 5,151 38,757
Unity 40 15 55
Unaffiliated 75,709 17,709 93,418
Totals 202,982 38,522 241,504

Data as of 2/1/2018

Party Active Inactive Total*
American Constitution 278 90 368
Democratic 90,663 13,714 104,377
Green 1,010 331 1,341
Libertarian 2,188 813 3,001
Republican 33,650 4,964 38,614
Unity 40 15 55
Unaffiliated 76,364 17,188 93,552
Totals 204,193 37,115 241,308

Data as of 3/1/2018

Party Active Inactive Total*
American Constitution 280 87 367
Democratic 91,093 13,457 104,550
Green 998 324 1,322
Libertarian 2,188 812 3,000
Republican 33,605 4,930 38,535
Unity 44 15 59
Unaffiliated 76,850 17,024 93,874
Totals 205,058 36,649 241,707

Data as of 4/1/2018

Party Active Inactive Total*
American Constitution 277 88 365
Democratic 91,387 13,263 104,650
Green 1,003 321 1,324
Libertarian 2,191 801 2,992
Republican 33,582 4,889 38,471
Unity 44 15 59
Unaffiliated 77,323 16,900 94,223
Totals 205,807 36,277 242,084

Data as of 5/1/2018

Party Active Inactive Total*
American Constitution 278 87 365
Democratic 91,505 13,121 104,626
Green 982 319 1,301
Libertarian 2,187 791 2,978
Republican 33,433 4,829 38,262
Unity 45 15 60
Unaffiliated 78,180 16,771 94,951
Totals 206,610 35,933 242,543

Data as of 6/1/2018

Party Active Inactive Total*
American Constitution 275 86 361
Democratic 92,109 12,679 104,788
Green 985 315 1,300
Libertarian 2,201 773 2,974
Republican 33,541 4,741 38,282
Unity 47 14 61
Unaffiliated 78,985 16,470 95,455
Totals 208,143 35,078 243,221

Data as of 7/1/2018

Party Active Inactive Total*
American Constitution 273 86 359
Democratic 89,277 15,522 104,799
Green 971 314 1,285
Libertarian 2,181 771 2,952
Republican 32,564 5,632 38,196
Unity 47 14 61
Unaffiliated 76,011 19,665 95,676
Totals 201,324 42,004 243,328

Data as of 8/1/2018

Party Active Inactive Total*
American Constitution 283 78 361
Democratic 90,026 14,781 104,807
Green 931 306 1,237
Libertarian 2,175 755 2,930
Republican 32,321 5,421 37,742
Unity 47 13 60
Unaffiliated 78,719 18,942 97,661
Totals 204,502 40,296 244,798

Data as of 9/1/2018

Party Active Inactive Total*
American Constitution 286 75 361
APV 4 0 4
Democratic 91,347 13,790 105,137
Green 936 292 1,228
Libertarian 2,218 727 2,945
Republican 32,413 5,214 37,627
Unity 53 12 65
Unaffiliated 80,681 18,062 98,743
Totals 207,938 38,172 246,110

Data as of 10/1/2018

Party Active Inactive Total*
American Constitution 293 71 364
APV 16 0 16
Democratic 94,463 11,865 106,328
Green 958 271 1,229
Libertarian 2,321 669 2,990
Republican 32,770 4,812 37,582
Unity 60 12 72
Unaffiliated 84,231 16,118 100,349
Totals 215,112 33,818 248,930

Data as of 11/1/2018

No data available for the selected time period.

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.

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.