| Tuesday 4 February 2020 | Maryland - Special Primary House CD 7 |
| Tuesday 18 February 2020 | Wisconsin - Special General Election House CD 7 |
| Tuesday 3 March 2020 | Alabama - Primary
Arkansas - Primary
California - Primary and Special Election House CD 25
North Carolina - Primary
Texas - Primary |
| Tuesday 10 March 2020 | Mississippi - Primary |
| Tuesday 17 March 2020 | Illinois - Primary
Ohio - Primary |
| Tuesday 31 March 2020 | Alabama - Runoff
Arkansas - Runoff
Mississippi - Runoff |
| Tuesday 21 April 2020 | North Carolina - Second Primary (if run-off is NOT required for a Federal office) |
| Tuesday 28 April 2020 | Maryland - Primary and Special Election House CD 7
Pennsylvania - Primary |
| Tuesday 5 May 2020 | Indiana - Primary |
| Tuesday 12 May 2020 | California - Special Runoff (if no one receives a majority on 3 March 2020) House CD 25
North Carolina - Second Primary (if run-off is required for a Federal office)
Nebraska - Primary
Wisconsin - Special Election House CD 7
West Virginia - Primary |
| Tuesday 19 May 2020 | Georgia - Primary
Idaho - Primary
Kentucky - Primary
Oregon - Primary |
| Tuesday 26 May 2020 | Texas - Runoff |
| Tuesday 2 June 2020 | District of Columbia - Primary
Iowa - Primary
Montana - Primary
New Jersey - Primary
New Mexico - Primary
South Dakota - Primary |
| Sunday 7 June 2020 | Puerto Rico - Primary |
| Tuesday 9 June 2020 | Maine - Primary
North Dakota - Primary
Nevada - Primary
South Carolina - Primary
Virginia - Primary |
| Tuesday 23 June 2020 | New York - Primary
South Carolina - Runoff |
| Tuesday 30 June 2020 | Colorado - Primary
Oklahoma - Primary
Utah - Primary |
| Tuesday 21 July 2020 | Georgia - Primary Runoff |
| Saturday 1 August 2020 | Virgin Islands - Primary Election |
| Tuesday 4 August 2020 | Arizona - Primary and Special Election Senate Class 3
Kansas - Primary
Michigan - Primary
Missouri - Primary
Washington - Primary |
| Thursday 6 August 2020 | Tennessee - Primary |
| Saturday 8 August 2020 | Hawaii - Primary |
| Tuesday 11 August 2020 | Connecticut - Primary
Minnesota - Primary
South Dakota - Secondary Election (runoff)
Vermont - Primary
Wisconsin - Primary |
| Tuesday 18 August 2020 | Alaska - Primary
Florida - Primary
Wyoming - Primary |
| Tuesday 25 August 2020 | Oklahoma - Runoff |
| Saturday 29 August 2020 | Guam - Primary Election |
| Tuesday 1 September 2020 | Massachusetts - Primary |
| Tuesday 8 September 2020 | New Hampshire - Primary
Rhode Island - Primary |
| Tuesday 15 September 2020 | Delaware - Primary |
| Tuesday 3 November 2020 | Alaska - General Election
Alabama - General Election
Arkansas - General Election
American Samoa - General Election (presumably)
Arizona - General Election and Special Election Senate Class 3
California - General Election
Colorado - General Election
Connecticut - General Election
District of Columbia - General Election
Delaware - General Election
Florida - General Election
Georgia - General Election and tentative Special Election Senate Class 3
Guam - General Election
Hawaii - General Election
Iowa - General Election
Idaho - General Election
Illinois - General Election
Indiana - General Election
Kansas - General Election
Kentucky - General Election
Louisiana - General Election - Open Primary / Presidential / Congressional
Massachusetts - General Election
Maryland - General Election
Maine - General Election
Michigan - General Election
Minnesota - General Election
Missouri - General Election
Northern Marianas - General Election (presumably)
Mississippi - General Election
Montana - General Election
North Carolina - General Election
North Dakota - General Election
Nebraska - General Election
New Hampshire - General Election
New Jersey - General Election
New Mexico - General Election
Nevada - General Election
New York - General Election
Ohio - General Election
Oklahoma - General Election
Oregon - General Election
Pennsylvania - General Election
Puerto Rico - General Election
Rhode Island - General Election
South Carolina - General Election
South Dakota - General Election
Tennessee - General Election
Texas - General Election
Utah - General Election
Virginia - General Election
Virgin Islands - General Election
Vermont - General Election
Washington - General Election
Wisconsin - General Election
West Virginia - General Election
Wyoming - General Election |
| Tuesday 17 November 2020 | Virgin Islands - General Runoff Election |
| Tuesday 1 December 2020 | Georgia - State and Local General Runoff |
| Saturday 5 December 2020 | Louisiana - Runoff Election - Open General / Congressional |
| Tuesday 5 January 2021 | Georgia - Federal General Runoff and tentative Special Runoff Election Senate Class 3 |
