Official Results do not count any write-in votes for candidates that did not register for qualified write-in status. Officially registered write-in votes total 67 votes for 14 candidates. The write-ins votes listed here were collected from each county official report (incomplete data).
Source for Popular Vote data: Illinois State Board of Elections, "President and Vice President of the United States," Official Vote November 6, 2012 General Election (Springfield, 2012)