| State / Territorial Primary | ||
| Mon | Feb 3 | Presidential Only: Iowa caucuses |
| Tue | Feb 11 | Presidential Only: New Hampshire |
| Sat | Feb 22 | Presidential Only: Nevada caucus (D) |
| Sat | Feb 29 | Presidential Only: South Carolina (D) |
| Tue | Mar 3 | Alabama ∙ Arkansas ∙ California ∙ North Carolina ∙ Texas Presidential Only: American Samoa caucus (D) ∙ Colorado ∙ Maine ∙ Massachusetts ∙ Minnesota ∙ Oklahoma ∙ Tennessee ∙ Utah ∙ Vermont ∙ Virginia |
| Democrats Abroad Global Presidential Primary runs through March 10 | ||
| Tue | Mar 10 | Mississippi Presidential Only: Idaho ∙ Michigan ∙ Missouri ∙ North Dakota caucus (D) ∙ Washington |
| Sat | Mar 14 | Northern Marianas convention (D) |
| Tue | Mar 17 | Illinois Presidential Only: Arizona (D) ∙ Florida |
| Tue | Mar 31 | Arkansas runoff ∙ Mississippi runoff |
| Sat | Apr 4 | Presidential Only: Alaska (D) ∙ Hawaii (D) ∙ Wyoming caucus (D) |
| Tue | Apr 7 | Presidential Only: Wisconsin |
| Tue | Apr 28 | Ohio |
| Sat | May 2 | Presidential Only: Guam caucus (D) ∙ Kansas (D) |
| Tues | May 12 | Nebraska |
| Tue | May 19 | Oregon US Congress & State: Idaho |
| Tue | Jun 2 | District of Columbia ∙ Indiana ∙ Maryland ∙ Montana ∙ New Mexico ∙ Pennsylvania ∙ South Dakota Presidential Only: Rhode Island US Congress & State: Iowa |
| Sat | Jun 6 | Presidential Only: Virgin Islands caucus (D) |
| Sun | Jun 7 | US Congress & State: Puerto Rico |
| Tue | Jun 9 | Georgia ∙ West Virginia US Congress & State: Nevada ∙ North Dakota ∙ South Carolina |
| Tues | Jun 23 | Kentucky ∙ New York US Congress & State: Mississippi runoff ∙ South Carolina runoff ∙ Virginia |
| Tue | Jun 30 | US Congress & State: Colorado ∙ Oklahoma ∙ Utah |
| Tue | Jul 7 | New Jersey Presidential Only: Delaware |
| Sat | Jul 11 | Presidential only: Louisiana |
| Tue | Jul 14 | Alabama runoff ∙ Texas runoff US Congress & State: Maine |
| Sat | Aug 1 | US Congress & State: Virgin Islands |
| Sat | Aug 4 | US Congress & State: Arizona ∙ Kansas ∙ Michigan ∙ Missouri ∙ Washington |
| Thr | Aug 6 | US Congress & State: Tennessee |
| Sat | Aug 8 | US Congress & State: Hawaii |
| Tue | Aug 11 | Connecticut US Congress & State: Georgia runoff ∙ Minnesota ∙ South Dakota runoff ∙ Vermont ∙ Wisconsin |
| Tue | Aug 18 | US Congress & State: Alaska ∙ Florida ∙ Wyoming |
| Tue | Aug 25 | US Congress & State: Oklahoma runoff |
| Sat | Aug 29 | US Congress & State: Guam |
| Tue | Sep 1 | US Congress & State: Massachusetts |
| Tue | Sep 8 | US Congress & State: New Hampshire ∙ Rhode Island |
| Tue | Sep 15 | US Congress & State: Delaware |
| Sat | Sep 19 | 45 Days to Election: Ballots for the November 3rd General Election should be arriving |