Colorado will offer nine points in the presidential electoral college. There's also a key senate battle between incumbent Cory Gardner and his challenger, former Colorado Governor John Hickenlooper.
Monday (Oct. 26) was the last day for Colorado residents to return their ballots by mail for the General Election on November 3 - but there are still ways you can vote.
The Centennial State has voted for the 22 Republicans, 13 Democrats and 1 third party populist. Colorado has voted for the winning president in 25 of the total 36 elections.