2016 United States presidential election in Arizona
The 2016 United States presidential election in Arizona was held on Tuesday, November 8, 2016, as part of the 2016 United States presidential elections in which all 50 states plus the District of Columbia participated. Arizona voters chose electors to represent them in the Electoral College via a popular vote, pitting the Republican Party's nominee, businessman Donald Trump, and running mate Indiana Governor Mike Pence against Democratic Party nominee, former Secretary of State Hillary Clinton, and her running mate Virginia Senator Tim Kaine. Arizona has 11 electoral votes in the Electoral College.
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| Turnout | 74.2% | |||||||||||||||||||||||||
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| Elections in Arizona |
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Despite the country at-large swinging to the right, Arizona's Republican margin of victory decreased from 9.0% in 2012 to only 3.5% in 2016, thus making it one of 11 states (along with the District of Columbia) to do so. Trump's margin of victory in Arizona was the smallest for any Republican who won the presidency since Arizona's founding in 1912, with Calvin Coolidge's 5.8% victory in 1924 being the second closest.
Notably, Maricopa County, the state's most populous county, went more Democratic than the state as a whole for the first time in state history. The county had not voted for a Democrat since Harry S. Truman in 1948. Therefore, Trump's narrow win in the county suggested the Republican Party was losing ground in the state. In fact, the county and the state would go on to vote Democratic in 2020.