Analysis of voter turnout in the 2014 midterm election in Colorado shows that low-propensity voters, including young voters, significantly overperformed their predicted turnout levels. This report also contains analyses of predicted versus actual turnout among various subgroups, including those based on demographics, partisanship, and vote history. While not conclusive, the evidence generated by these analyses supports the assertion that Colorado’s universal vote-by-mail system — which debuted in 2014 — likely played a role in increasing turnout.
In 2013, Colorado implemented an all-mail voting system. America Votes Colorado has inquired into whether the change has impacted voter turnout patterns. Below you’ll find voter turnout estimates in 2010 and 2014, broken out by race and voting method, allowing for comparison across comparable elections before and after the all mail system was implemented.