The 2016 United States presidential election in Colorado was held on Tuesday, November 8, 2016, as part of the 2016 United States presidential election in which all 50 states plus the District of Columbia participated. Colorado voters chose electors to represent them in the Electoral College via a popular vote, pitting the Republican nominee, businessman Donald Trump, and running mate Indiana Governor Mike Pence against Democratic nominee, former Secretary of State Hillary Clinton, and her running mate Virginia Senator Tim Kaine. Colorado has nine electoral votes in the Electoral College.

Clinton received 48.2% of the vote, carrying the state's nine electoral votes. Trump received 43.3% of the vote, thus marking a Democratic margin of victory of 4.9%. This was the fourth time since Colorado had achieved statehood that the Republican nominee won the election without carrying Colorado, the first three having been in 1896, 1900, and 1908 (all when the Democratic nominee was William Jennings Bryan of neighboring Nebraska, a populist with unusual popularity in the traditionally Republican West); and the second time Colorado has voted Democratic in three consecutive presidential elections, the first having been the elections of 1908, 1912, and 1916. Trump became the first ever Republican to win the White House without carrying Alamosa or Broomfield Counties, as well as the first to do so without carrying Jefferson, Arapahoe, or Larimer Counties since William McKinley in 1900, and the first to do so without carrying Ouray County since William Howard Taft in 1908.

At the same time, Trump flipped five counties in the state: Conejos, Chaffee, Huerfano, Las Animas, and Pueblo. The last two had not supported a Republican presidential candidate since Richard Nixon's landslide in 1972. Despite Clinton's victory, this is the sole election since Colorado's Democratic winning streak from 2008 forward that the Democratic candidate's percentage in the state was held to only a plurality, while winning the state by a less than (albeit very narrowly in this case) 5% margin. Colorado was also the only state that voted for Clinton won by a single digit in 2016 that would later vote for both Joe Biden in 2020 and Kamala Harris in 2024 by double digits.

Caucuses

Democratic caucuses

Opinion polling

Results

Caucus date: March 1, 2016

+ Detailed results for the Colorado Democratic caucuses, March 1, 2016 District Total estimate Bernie Sanders Hillary Clinton Votes Estimateddelegates Votes Estimateddelegates Votes Estimateddelegates 1st district 29,474 8 16,232 4 13,242 4 2nd district 30,624 7 19,376 4 11,248 3 3rd district 14,671 6 8,956 4 5,715 2 4th district 10,060 5 6,115 3 3,945 2 5th district 10,315 5 6,338 3 3,977 2 6th district 12,836 6 6,675 3 6,161 3 7th district 14,655 6 9,154 4 5,501 4 At-large delegates 122,635 14 72,846 8 49,789 6 Pledged PLEOs 9 5 4 Total 66 38 28

Results of the county assemblies Timeframe for the county assemblies: March 2–26, 2016

! rowspan="2" | Candidate ! colspan="2" | State + District delegates ! colspan="3" | Estimated delegates |- ! Count ! Percentage ! Pledged ! Unpledged ! Total

| style="text-align:left;" | Bernie Sanders | 372 || 61.39%

| style="text-align:left;"| Hillary Clinton | 234 || 38.61%

| style="text-align:left;"| Uncommitted

! Total ! 606 !! 100% ! !! !!

Results of the congressional district conventions

! rowspan=2 | District ! rowspan=2 | Delegatesavailable ! colspan=2 | Delegates won |- ! Sanders ! Clinton |- | style="text-align:left" | 1st district | 8 | 5 | 3 |- | style="text-align:left" | 2nd district | 7 | 4 | 3 |- | style="text-align:left" | 3rd district | 6 | 4 | 2 |- | style="text-align:left" | 4th district | 5 | 3 | 2 |- | style="text-align:left" | 5th district | 5 | 3 | 2 |- | style="text-align:left" | 6th district | 6 | 3 | 3 |- | style="text-align:left" | 7th district | 6 | 4 | 2 |- ! Total ! style="text-align:right" | 43 ! style="text-align:right" | 26 ! style="text-align:right" | 17

Results of the state convention State convention date: April 16, 2016

+ Colorado Democratic State Convention, April 16, 2016 Candidate State convention delegates National delegates won Count Percentage At-large PLEO Total Bernie Sanders 1,900 62.3% 9 6 15 Hillary Clinton 1,150 37.7% 5 3 8 Total 3,050 100.0% 14 9 23

Republican conventions

From April 2–8, 2016, conventions were held in each of Colorado's seven congressional districts. Cruz swept all seven, winning 21 delegates total. On April 9, 2016, the state convention was held to elect the 13 statewide delegates and the 3 RNC delegates. Again, Cruz won all 13 statewide at-large delegates. Cruz was also the only candidate to address the state convention.

A proposal to forbid Colorado Republican delegates from voting for Donald Trump was written in March 2016 by Robert Zubrin. The group "Colorado Republicans for Liberty" handed out fliers of Zubrin's resolution at the state's convention. Irregularities on the ballot were discovered at the state's convention. Delegate #379 (Jerome Parks, a Trump delegate) was replaced on the ballot with a duplicate of delegate #378 (a Ted Cruz delegate). The Colorado Republican Party's Twitter account posted the message "We did it #NeverTrump" after Cruz received all the bound delegates at the April convention. The party claims somebody hacked its Twitter account, and the party claims to be investigating how the message was posted. In May 2015, the Colorado Senate defeated a bill to hold a 2016 presidential primary. State senators Kevin Grantham, Kent Lambert, Laura J. Woods, and Jerry Sonnenberg voted to stop the bill. Sonnenberg, Woods, Grantham, and Lambert are members of the Ted Cruz "Colorado Leadership Team" for Ted Cruz. Congressman Ken Buck and Colorado Secretary of State Wayne Williams are also members of the Ted Cruz "Colorado Leadership Team".

The conventions were selected through statewide caucuses, which were conducted at the precinct level on March 1. No voter preference poll was held due to a decision in August by the state party to cancel it.

Three candidates contested the Republican presidential conventions: Ted Cruz John Kasich Donald Trump Marco Rubio and Ben Carson had dropped out of the race by the time the conventions were held, though they were still running during the March 1 caucuses.

Green Party convention On April 3, the Green Party of Colorado held a presidential nominating convention in Centennial, Colorado, for registered Green voters.

On April 4, the Green Party of Colorado announced that Jill Stein had won the convention and received all 5 delegates.

+ Colorado Green Party Convention, April 3, 2016. Candidate Votes Percentage National delegates Jill Stein - - 5William Kreml - - -Kent Mesplay - - -Sedinam Moyowasifza-Curry - - -Darryl Cherney - - -Uncommitted - - - Total--5

General election Polling

Throughout the race, Clinton lead in almost every poll in margins varying between 1 and 11 points, with a few polls showing a tie or a Trump lead. One of the last polls showed a tie between Clinton and Trump, but the last poll showed Clinton leading Trump 50% to 45%, which was very accurate compared to the results. The average of the last three polls showed Clinton leading Trump 44% to 41%.

Predictions SourceRankingAs ofABC NewsNovember 8, 2016CNNNovember 4, 2016Cook Political ReportNovember 7, 2016Electoral-vote.comNovember 8, 2016 Rothenberg Political Report November 7, 2016Sabato's Crystal BallNovember 7, 2016RealClearPoliticsNovember 8, 2016

Results Voter turnout for the 2016 United States presidential election in Colorado was 72.4%.

By county County Hillary ClintonDemocratic Donald TrumpRepublican Various candidatesOther parties Margin Total votes cast # % # % # % # % Adams 96,558 49.86% 80,082 41.35% 17,037 8.79% 16,476 8.51% 193,677 Alamosa 3,189 45.96% 3,046 43.90% 704 10.14% 143 2.06% 6,939 Arapahoe 159,885 52.76% 117,053 38.63% 26,110 8.61% 42,832 14.13% 303,048 Archuleta 2,500 34.06% 4,264 58.10% 575 7.84% -1,764 -24.04% 7,339 Baca 283 13.14% 1,753 81.42% 117 5.44% -1,470 -68.28% 2,153 Bent 590 30.62% 1,188 61.65% 149 7.73% -598 -31.03% 1,927 Boulder 132,334 70.34% 41,396 22.00% 14,415 7.66% 90,938 48.34% 188,145 Broomfield 19,731 52.35% 14,367 38.12% 3,592 9.53% 5,364 14.23% 37,690 Chaffee 4,888 43.45% 5,391 47.92% 971 8.63% -503 -4.47% 11,250 Cheyenne 132 11.98% 925 83.94% 45 4.08% -793 -71.96% 1,102 Clear Creek 2,729 46.52% 2,575 43.90% 562 9.58% 154 2.62% 5,866 Conejos 1,771 44.03% 1,914 47.59% 337 8.38% -143 -3.56% 4,022 Costilla 1,125 60.88% 588 31.82% 135 7.30% 537 29.06% 1,848 Crowley 339 22.20% 1,079 70.66% 109 7.14% -740 -48.46% 1,527 Custer 797 25.99% 2,061 67.22% 208 6.79% -1,264 -41.23% 3,066 Delta 4,087 24.34% 11,655 69.42% 1,048 6.24% -7,568 -45.08% 16,790 Denver 244,551 73.69% 62,690 18.89% 24,611 7.42% 181,861 54.80% 331,852 Dolores 242 19.28% 944 75.22% 69 5.50% -702 -55.94% 1,255 Douglas 68,657 36.62% 102,573 54.71% 16,270 8.67% -33,916 -18.09% 187,500 Eagle 14,099 55.90% 8,990 35.64% 2,134 8.46% 5,109 20.26% 25,223 El Paso 108,010 33.86% 179,228 56.19% 31,730 9.95% -71,218 -22.33% 318,968 Elbert 3,134 19.61% 11,705 73.25% 1,141 7.14% -8,571 -53.64% 15,980 Fremont 5,297 24.11% 15,122 68.82% 1,554 7.07% -9,825 -44.71% 21,973 Garfield 11,271 42.58% 13,132 49.61% 2,067 7.81% -1,861 -7.03% 26,470 Gilpin 1,634 45.69% 1,566 43.79% 376 10.52% 68 1.90% 3,576 Grand 3,358 39.10% 4,494 52.33% 736 8.57% -1,136 -13.23% 8,588 Gunnison 5,128 54.48% 3,289 34.94% 995 10.58% 1,839 19.54% 9,412 Hinsdale 197 33.45% 339 57.56% 53 8.99% -142 -24.11% 589 Huerfano 1,633 43.17% 1,883 49.78% 267 7.05% -250 -6.61% 3,783 Jackson 171 19.86% 629 73.05% 61 7.09% -458 -53.19% 861 Jefferson 160,776 48.89% 138,177 42.01% 29,930 9.10% 22,599 6.88% 328,883 Kiowa 91 10.64% 728 85.15% 36 4.21% -637 -74.51% 855 Kit Carson 536 14.48% 2,967 80.15% 199 5.37% -2,431 -65.67% 3,702 La Plata 15,525 49.84% 12,587 40.41% 3,038 9.75% 2,938 9.43% 31,150 Lake 1,616 50.52% 1,270 39.70% 313 9.78% 346 10.82% 3,199 Larimer 93,113 47.51% 83,430 42.57% 19,438 9.92% 9,683 4.94% 195,981 Las Animas 2,650 39.01% 3,710 54.62% 433 6.37% -1,060 -15.61% 6,793 Lincoln 409 16.79% 1,892 77.67% 135 5.54% -1,483 -60.88% 2,436 Logan 1,851 19.04% 7,282 74.90% 589 6.06% -5,431 -55.86% 9,722 Mesa 21,729 27.98% 49,779 64.10% 6,146 7.92% -28,050 -36.12% 77,654 Mineral 237 36.35% 344 52.76% 71 10.89% -107 -16.41% 652 Moffat 874 13.39% 5,305 81.30% 346 5.31% -4,431 -67.91% 6,525 Montezuma 3,973 30.90% 7,853 61.07% 1,032 8.03% -3,880 -30.17% 12,858 Montrose 5,466 25.80% 14,382 67.88% 1,338 6.32% -8,916 -42.08% 21,186 Morgan 3,151 26.35% 8,145 68.10% 664 5.55% -4,994 -41.75% 11,960 Otero 2,943 34.82% 4,928 58.31% 581 6.87% -1,985 -23.49% 8,452 Ouray 1,697 51.27% 1,351 40.82% 262 7.91% 346 10.45% 3,310 Park 3,421 32.84% 6,135 58.89% 861 8.27% -2,714 -26.05% 10,417 Phillips 436 18.70% 1,791 76.80% 105 4.50% -1,355 -58.10% 2,332 Pitkin 7,333 69.69% 2,550 24.23% 640 6.08% 4,783 45.46% 10,523 Prowers 1,186 23.64% 3,531 70.39% 299 5.97% -2,345 -46.75% 5,016 Pueblo 35,875 45.62% 36,265 46.11% 6,506 8.27% -390 -0.49% 78,646 Rio Blanco 436 12.64% 2,791 80.90% 223 6.46% -2,355 -68.26% 3,450 Rio Grande 2,001 36.16% 3,085 55.75% 448 8.09% -1,084 -19.59% 5,534 Routt 7,600 54.34% 5,230 37.39% 1,156 8.27% 2,370 16.95% 13,986 Saguache 1,417 49.98% 1,147 40.46% 271 9.56% 270 9.52% 2,835 San Juan 265 52.37% 215 42.49% 26 5.14% 50 9.88% 506 San Miguel 2,975 68.72% 1,033 23.86% 321 7.42% 1,942 44.86% 4,329 Sedgwick 267 19.57% 1,015 74.41% 82 6.02% -748 -54.84% 1,364 Summit 9,557 59.09% 5,100 31.53% 1,517 9.38% 4,457 27.56% 16,174 Teller 3,603 24.94% 9,745 67.47% 1,096 7.59% -6,142 -42.53% 14,444 Washington 296 10.83% 2,299 84.12% 138 5.05% -2,003 -73.29% 2,733 Weld 46,519 34.35% 76,651 56.60% 12,260 9.05% -30,132 -22.25% 135,430 Yuma 726 15.15% 3,850 80.36% 215 4.49% -3,124 -65.21% 4,791Total 1,338,87048.16%1,202,48443.25%238,8938.59%136,3864.91%2,780,247