The following primary and caucus dates have been scheduled by state statutes or state party decisions, but are subject to change pending legislation, state party delegate selection plans, or the decisions of state secretaries of state….
- February 3: Iowa caucuses
- February 11: New Hampshire primary
- February 22: Nevada caucuses
- February 29: South Carolina primary
- March 3: Super Tuesday (Alabama, Arkansas, California, Colorado, Maine, Massachusetts, Minnesota, North Carolina, Oklahoma, Tennessee, Texas, Utah, Vermont, and Virginia primaries); Democrats Abroadparty-run primary for expatriates features a March 3–10 voting period.
- March 10: Idaho, Michigan, Mississippi, Missouri, Ohio, and Washington primaries; North Dakota firehouse caucuses (identical to a party-run primary)
- March 17: Arizona, Florida, and Illinois primaries
- March 24: Georgia primary
- March 29: Puerto Rico primary (Currently scheduled for June 7 but expected to be held on March 29)
- April 4: Alaska, Hawaii, and Louisiana primaries
- April 7: Wisconsin primary
- April 28: Connecticut, Delaware, Maryland, New York (Currently scheduled for February 4 but expected to be held on April 28), Pennsylvania, and Rhode Island primaries
- May 2: Kansas primary
- May 5: Indiana primary
- May 12: Nebraska and West Virginia primaries
- May 19: Kentucky and Oregon primaries (Oregon legislature considering move to March 3 or 10)
- June 2: Montana, New Jersey, New Mexico, and South Dakota primaries
- June 16: District of Columbia primary (bill proposing a move to June 2 has been tabled)
As of June 2019, primaries and caucuses for the following states/territories are not yet scheduled:
- American Samoa caucuses (previously held on March 1, 2016)
- Northern Mariana Islands caucuses (previously held on March 12, 2016)
- Wyoming caucuses (previously held on April 9, 2016): The state party initially via its draft plan proposed a party-run caucus for March 2020, then shortly considered moving it to April 18,but may have the option of replacing it with a party-run primary (as a government-run primary is not an option in the state). The final decision setting the format and date will be communicated via an updated plan in the summer of 2019.
- Guam caucuses (previously held on May 7, 2016)
- United States Virgin Islands caucuses (previously held on June 4, 2016)
The 57 states, districts, territories, or other constituencies with elections of pledged delegates to decide the Democratic presidential nominee, currently plan to hold the first major determining step for these elections via 49 primaries and six caucuses (Iowa, Nevada and four territories), while one state, Wyoming, has not yet decided its election format, although the Wyoming Democratic Party’s tentative delegate selection plan draft issued in April 2019 maintains the caucus. The number of states holding caucuses decreased from 14 in the 2016 nomination process to so far only two in 2020….
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