On April 26, 2016, in the presidential primaries, Connecticut voters expressed their preferences for the Democratic and Republican parties' respective nominees for president. Registered members of each party only voted in their party's primary, while voters who were unaffiliated could choose any one primary in which to vote, provided they registered with the party they wished to vote with in person by noon the day before.
Hillary Clinton won the election in Connecticut with 54.5% of the vote, a reduced margin from President Obama's 58.06% in 2012. Donald Trump, who later went on to win the presidency, received 40.9% of the vote. Clinton carried six of the state's eight counties; however, this was the first time a Republican had won Windham County since George H. W. Bush in 1988.