| First day to circulate and file nomination petitions | January 28, 2020 |
| Last day to circulate and file nomination petitions | February 18, 2020 |
| First day to circulate and file nomination papers | February 19, 2020 |
| Last day for withdrawal by candidates who filed nomination petitions | March 4, 2020 |
| Last day to REGISTER before the primary | May 18, 2020 |
| Last day to apply for a mail-in or civilian absentee ballot | May 26, 2020 |
| Last day for County Boards of Elections to receive voted mail-in and civilian absentee ballots (must be received by 8:00 PM) | June 2, 2020 |
| GENERAL PRIMARY | June 2, 2020 |
| First day to REGISTER after primary | June 3, 2020 |
| Last day for County Board of Elections to receive voted military and overseas absentee ballots (submitted for delivery no later than 11:59 P.M. on April 27) | June 9, 2020 |
| Last day to circulate and file nomination papers | August 3, 2020 |
| Last day for withdrawal by candidates nominated by nomination papers | August 10, 2020 |
| Last day for withdrawal by candidates nominated at the primary | August 10, 2020 |
| Last day to REGISTER before the NOVEMBER election | October 19, 2020 |
| Last day to apply for a mail-in or civilian absentee ballot | October 27, 2020 |
| Last day for County Boards of Elections to receive voted mail-in and civilian absentee ballots (must be received by 8:00 P.M.) | November 3, 2020 |
| GENERAL ELECTION | November 3, 2020 |
| First day to register AFTER November election | November 4, 2020 |
| Last day for County Board of Elections to receive voted military and overseas absentee ballots (submitted for delivery no later than 11:59 P.M. on November 4) | November 10, 2020 |
