Illinois 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.

[1] Illinois was won by Clinton, who garnered 55.24% of the votes cast against Trump's 38.35%, thus winning the state by a margin of 17.07%.

Prior to the election, news organizations accurately predicted that the state would be carried by Clinton, who was born in Illinois.

He also became the first Republican ever to win the White House without carrying DeKalb, DuPage, Kane, Lake, Will, or Winnebago Counties.

Physician and activist Jill Stein won a landslide of the popular vote, taking almost all of the state's 23 delegates.

Registered Green party voters could participate in the primary through an online ballot or at select caucus sites in the state on various dates.

Five candidates stood for election, including a sixth "uncommitted" option for the ballot.

The candidates included activist and Green nominee in the 2012 presidential election, Jill Stein, singer-songwriter Darryl Cherney, businesswoman Sedinam Moyowasifza-Curry, perennial candidate Kent Mesplay, and professor William "Bill" Kreml.

[23][24] Peoria County matched the national popular vote this year, as it did in the 2012 election.