[2] Turnout by county[2] Illinois voted for the Democratic ticket of Barack Obama and Joe Biden.

This was the fifth consecutive presidential election in which Illinois had voted for the Democratic ticket.

Incumbent Democrat Dick Durbin was reelected to a third term.

All 19 of Illinois’ seats in the United States House of Representatives were up for election in 2008.

[3] A measure which would call for a state constitutional convention failed.