Voter Registration Analysis, October 2016

September typically brings large voter registration changes as political parties and organizations gear up voter registration drives and voters tune in to the election. So what do the most recent numbers from the Colorado Secretary of State tell us about voter registration in 2016?

To find out, we looked back at voter registration trends over the past few months and compared them to the same period in 2012, the last presidential election. Below are a few notes on what we found.

October 2012 October 2016 Change
Voters Share Voters Share (as a share of all voters)
Republican 1,142,859 32.1% 1,154,367 30.7% Down 4.1%
Democrat 1,128,103 31.6% 1,177,860 31.4% Down 0.9%
Unaffiliated 1,256,464 35.2% 1,359,544 36% Up 2.7%
All Voters 3,565,728 3,756,840

Overall, voter registration is up

As of October 1, 2016, there are 3,756,840 registered voters in Colorado, an increase of five percent from the 3,565,728 registered voters in October 2012.

Party affiliation is shifting

The Republican share of voters in the state has dropped 4.1 percent since October 2012.

The Democratic share of voters in the state has dropped 0.9 percent since October 2012.

The Unaffiliated share of voters in the state has increased 2.7 percent since October 2012.

Neither party seems to have aggressive voter registration programs

Republican voter registration from July to October 2012 jumped 2.2% (+24,624 voters). Over the same period in 2016, Republican party registration grew only slightly, up 0.9% (+10,618 voters).

Democratic voter registration from July to October 2012 jumped 3.9% (+42,344 voters). Over the same period in 2016, Democratic party registration was up 1.8% (+20,990 voters).

Overall voter registration from July to October 2012 was up 4.1% (+141,319 voters). Over the same period in 2016, voter registration rose only 2.7% (+97,917 voters).

Third party registration is growing — slightly

In October 2012, Republicans, Democrats and Unaffiliated voters accounted for 98.9% of all voters.

In October 2016, Republicans, Democrats and Unaffiliated voters accounted for 98.3% of all voters.

In October 2012, Republican and Democratic voters accounted for 64 percent of all voters. Today they still account for 62 percent.