- December 20, 2017 – First day to apply for mail ballot.
- February 8, 2018 – First day for early voting at the office of local election authority. Each election authority can establish locations, dates and hours for early voting.
- February 20, 2018 – Last day for voter registration by deputy registrars.
- February 21 – March 20, 2018 – Grace period registration and voting.
- February 23, 2018 – Last day for election authorities to post schedule for early voting.
- March 4, 2018 – Last day for voters to register through the State Board of Elections website.
- March 19, 2018 – Last day for early voting.
- March 20, 2018 -General Primary Election: Polls open from 6:00 am to 7:00 pm.
Check registration status, find your polling place, find early voting locations, register online, print sample ballots and more at your local board of elections:
- Chicago: https://chicagoelections.com/en/key-dates-and-fast-facts.html
- Suburban Cook County: https://www.cookcountyclerk.com/agency/ways-vote
- DuPage County: https://www.dupageco.org/Election/Voting/