The Democratic National Committee has approved the Call for Convention for the 2020 Democratic National Convention (9 September 2018) and Delegate Selection Rules for the 2020 Democratic National Convention (7 September 2018) for the 2020 Democratic National Convention.

The party set dates for the pre-window states [Delegate Selection Rules 12.A.]: Iowa-- may begin no earlier than 3 February 2020, New Hampshire-- 11 February 2020, Nevada-- 22 February 2020, and South Carolina-- 29 February 2020. The pre-windows states are designated with a ‡ in the table below. All other states may begin on 3 March 2020 (Stage I).

Delegate selection primaries, caucuses, and conventions will begin on the first Tuesday in March (Stage I - 3 March 2020). The Democrats will award states who begin their process in April (Stage II) with a 10% bonus. For those beginning in May or June (Stage III), a 20% bonus. Starting on the Tuesday 24 March 2020 (Stage I cluster), a 15% bonus is awarded when clusters of 3 or more neighboring states begin on the same date [Call to Convention I.C.].

The Democratic jurisdictions are listed below in chronological order according to their "First Determining Step". Many of these events are primaries whose dates are established by state law.

Circa or presumably-- an unofficial date. An unconfirmed Presidential Primary established by currently-effective State statute or introduced bill; or- where the foregoing information could not be obtained- the state's prior delegate selection process and associated dates adjusted to the corresponding dates in the current year.

‡ Pre-window state.