How Colorado voted, 2004 to 2024
In 2024, local election offices in Colorado reported counting 3,240,754 ballots, or 70.7 for every 100 registered voters.
These are the counts that each local election office sent to the U.S. Election Assistance Commission after every November election: registered voters, ballots cast and how they were cast, mail ballots sent and rejected, provisional ballots, overseas and military voters, polling places and poll workers. Where an office gave no figure, the page says so and says why. No figure here is an estimate. Voting history timeline for Colorado · 2026 early and mail vote counts
Registered voters and ballots cast
Ballots cast are the votes the local office counted. A registered voter is on the list for that November.
Colorado
- Registered voters
- Total ballots cast and counted
| Election | Registered voters | Total ballots cast and counted | Ballots counted per 100 registered |
|---|---|---|---|
| 2024 | 4,583,280 | 3,240,754 | 70.7 |
| 2022 | 4,355,778 | 2,539,897 | 58.3 |
| 2020 | 4,211,528 | 3,320,607 | 78.8 |
| 2018 | 3,953,613 | 2,586,432 | 65.4 |
| 2016 | 3,840,303 | 2,884,199 | 75.1 |
| 2014 | 3,649,105 | 2,075,858 | 56.9 |
| 2012 | 3,651,091 | 2,594,628 | 71.1 |
| 2010 | 3,293,942 | 1,828,323 | 55.5 |
| 2008 | 3,214,382 | 2,426,253 | 75.5 |
| 2006 | 2,975,845 | 1,586,042 | 53.3 |
| 2004 | 3,101,956 | 2,148,036 | 69.2 |
Download these figures as a spreadsheet (CSV)
Source: U.S. Election Assistance Commission, Election Administration and Voting Survey ↗, EAVS Time Series, county version (data file ↗, user guide and codebook ↗). Retrieved Nov 2, 2026. File SHA-256 a10de20cba65514f…
Compare two years
Colorado: 2020 and 2024
| Measure | 2020 | 2024 | Change |
|---|---|---|---|
| Voters | |||
| Registered voters | 4,211,528 | 4,583,280 | +371,752 (+8.8%) |
| Active registered voters | 3,803,762 | 4,074,612 | +270,850 (+7.1%) |
| Ballots cast | |||
| Total ballots cast and counted | 3,320,607 | 3,240,754 | −79,853 (−2.4%) |
| Cast in person on Election Day | 89,789 | 141,556 | +51,767 (+57.7%) |
| Cast in person during early voting | 108,856 | 109,209 | +353 (+0.3%) |
| Cast by mail or absentee ballot | 0 | 0 | 0 |
| Cast by mail in an all-mail election | 3,092,904 | 2,957,550 | −135,354 (−4.4%) |
| Cast by overseas and military voters | 28,908 | 32,234 | +3,326 (+11.5%) |
| Cast as a provisional ballot | 150 | 205 | +55 (+36.7%) |
| Mail ballots | |||
| Mail ballots sent to voters | 3,904,381 | 4,090,266 | +185,885 (+4.8%) |
| Mail ballots returned by voters | 3,122,440 | 3,000,301 | −122,139 (−3.9%) |
| Mail ballots counted | 3,092,904 | 2,957,550 | −135,354 (−4.4%) |
| Mail ballots rejected | 29,536 | 42,751 | +13,215 (+44.7%) |
| Why mail ballots were rejected | |||
| arrived after the deadline | 2,147 | 2,815 | +668 (+31.1%) |
| no voter signature | 1,594 | 2,269 | +675 (+42.3%) |
| no witness signature | Reported as not applicable | Reported as not applicable | No change shown: one year has no figure |
| signature did not match | 21,924 | 35,255 | +13,331 (+60.8%) |
| unofficial envelope | 116 | 226 | +110 (+94.8%) |
| no ballot in the envelope | 338 | 335 | −3 (−0.9%) |
| no secrecy envelope | Not asked in that year's survey | Reported as not applicable | No change shown: one year has no figure |
| more than one ballot in the envelope | 56 | 128 | +72 (+128.6%) |
| envelope not sealed | Reported as not applicable | Reported as not applicable | No change shown: one year has no figure |
| no postmark | Not asked in that year's survey | Reported as not applicable | No change shown: one year has no figure |
| no address on the envelope | Reported as not applicable | Reported as not applicable | No change shown: one year has no figure |
| voter had died | 30 | 15 | −15 (−50%) |
| voter had already voted | 121 | 386 | +265 (+219%) |
| required document missing | 3,000 | 1,226 | −1,774 (−59.1%) |
| voter not eligible | Not asked in that year's survey | Reported as not applicable | No change shown: one year has no figure |
| no ballot application | Reported as not applicable | Reported as not applicable | No change shown: one year has no figure |
| no election official signature | Reported as not applicable | Not asked in that year's survey | No change shown: one year has no figure |
| other reasons | 210 (23 of 64 places reported) | 96 | −114 (−54.3%) |
| Provisional ballots | |||
| Provisional ballots cast | 342 | 444 | +102 (+29.8%) |
| Provisional ballots fully counted | 150 | 194 | +44 (+29.3%) |
| Provisional ballots partly counted | 0 | 13 | +13 |
| Provisional ballots rejected | 192 | 237 | +45 (+23.4%) |
| Overseas and military voters | |||
| Registered overseas and military voters | 42,291 | 62,753 | +20,462 (+48.4%) |
| Overseas and military ballots sent | 45,558 | 55,483 | +9,925 (+21.8%) |
| Overseas and military ballots returned | 29,631 | 33,084 | +3,453 (+11.7%) |
| Overseas and military ballots counted | 28,762 | 32,072 | +3,310 (+11.5%) |
| Polling places and poll workers | |||
| Polling places and voting sites | Not asked in that year's survey | 366 | No change shown: one year has no figure |
| Election Day polling places | 341 | 366 | +25 (+7.3%) |
| Precincts | 3,215 | 3,243 | +28 (+0.9%) |
| Poll workers | 7,185 | 7,587 | +402 (+5.6%) |
| Ballot drop boxes | Not asked in that year's survey | 434 | No change shown: one year has no figure |
Compare two places
Choose a second place to see the two side by side: a table for one election and a chart of how many ballots were counted for every 100 registered voters.
Midterm to midterm: 2014, 2018 and 2022
Midterm elections are held halfway through a president's term, and fewer people vote in them than in presidential years, so the fairest comparison is with other midterms.
| Measure | 2014 | 2018 | 2022 |
|---|---|---|---|
| Registered voters | 3,649,105 | 3,953,613 | 4,355,778 |
| Total ballots cast and counted | 2,075,858 | 2,586,432 | 2,539,897 |
| Ballots counted per 100 registered | 56.9 | 65.4 | 58.3 |
| Cast in person on Election Day | 83,440 | 31,628 | 93,149 |
| Cast in person during early voting | 17,620 | 89,355 | 27,022 |
| Cast by mail or absentee ballot | Not reported to the Election Assistance Commission | Reported as not applicable | Reported as not applicable |
| Mail ballots returned by voters | 1,972,223 | 2,449,409 | 2,431,292 |
| Mail ballots rejected | 14,903 | 19,170 | 25,046 |
Download these figures as a spreadsheet (CSV)
2026 so far in Colorado
These are partial counts of ballots already cast, taken before the election ends. They are not final and not comparable with the final 2022 counts beside them until every ballot is counted. As of Nov 4, 2026 1:59 am EST, as the state reports it.
| Measure, Colorado | 2022, final | 2026, partial |
|---|---|---|
| Mail or absentee ballots returned | 2,431,292 | 2,528,961 |
| Early and mail ballots cast, all methods the state counts together | The survey has no matching line | 2,671,424 |
The state's official page ↗ · Early and mail vote counts for every state
How this archive is built
The U.S. Election Assistance Commission asks every local election office to complete the Election Administration and Voting Survey after each November general election. In 2026 the commission published all 11 surveys from 2004 to 2024 as one combined file, with consistent column names and county versions of the data. This page reads that county file and changes nothing in it except where noted below.
- A number is what the local office reported. The commission uses four codes for no number: not reported, does not apply, skipped, and not asked that year. The page shows each as a sentence.
- A state or national total adds up only the places that reported that line. When some did not, the total is marked partial and says how many places reported.
- This site withholds a figure when it contradicts the same county's other answers: more mail ballots returned than sent, many more ballots counted than registered voters, or polling places far above the county's own precinct count. Those cells say so. 1665 figures across all years are withheld.
- Counties in Connecticut, Maine, Massachusetts, New Hampshire, Rhode Island and Vermont, and in Wisconsin from 2012, are built by the commission from town or municipal reports. Connecticut's counties are the former counties the commission used, not the planning regions the Census Bureau now lists.
- Polling place counts are not the same in every year: before 2018 the survey counted early-voting sites with Election Day sites, and the survey did not ask for a total in 2018 and 2020.
- The data holds counts for places only. There is no voter-level information.
Files and survey items, by year
| Election | Places | Figures withheld here | Original survey items (ballots cast, registered voters, mail ballots sent) |
|---|---|---|---|
| 2024 | 3,120 | 7 | cast F1a; registered A1a; mail sent C1a |
| 2022 | 3,119 | 26 | cast F1a; registered A1a; mail sent C1a |
| 2020 | 3,121 | 39 | cast F1a; registered A1a; mail sent C1a |
| 2018 | 3,118 | 169 | cast F1a; registered A1a; mail sent C1a |
| 2016 | 3,118 | 57 | cast F1a; registered A1a; mail sent C1a |
| 2014 | 3,119 | 24 | cast QF1a; registered QA1a; mail sent QC1a |
| 2012 | 3,118 | 872 | cast QF1a; registered QA1a; mail sent QC1a |
| 2010 | 3,117 | 65 | cast QF1a; registered QA1a; mail sent QC1a |
| 2008 | 3,056 | 94 | cast F1a, F1a_NotAvailable; registered A1; mail sent C1a, C1a_NotAvailable |
| 2006 | 3,116 | 158 | cast Q34Total; registered Q022006Total; mail sent -- |
| 2004 | 3,118 | 154 | cast 2a; registered 1a+1b; mail sent 4b |
Every year comes from one file: EAVS_Time_Series_County_Collapse_2004_2024.xlsx ↗, SHA-256 a10de20cba65514f92c9212910ff32e5e9a3fd82baec474ea46793940551e344, retrieved Nov 2, 2026. The commission's guide to the file, which names the original survey item for every column in every year: user guide ↗ (SHA-256 6115d01dffcc356e5e60707ef12a0c7a3c598d2678f9f22c36a2dab3e7693ba3). Each year's raw survey files are listed on the commission's EAVS history page ↗.