As early as 90 days before an election, any registered voters in Illinois can submit a request to have a ballot mailed to them, which they can, in turn, complete and return by mail. Requests can be made electronically (without a voter signature), or by signing a printed request form and mailing it to the election official. Requests must be received by NOON on March 30, 2017.
Visit https://www.lakecountyil.gov/351/Voter-Power, then enter your name, street address and birth day, and you can make a request by email or download a form with your information already entered that you must simply sign and return to the Clerk. Ballots start going out approximately 40 days before the election. It could not be easier.
For more info, go to https://www.lakecountyil.gov/348/Voting-By-Mail