| January |
| 3 | Iowa caucuses (Dem. | GOP) |
| 5 | Wyoming caucus (GOP) |
| 8 | New Hampshire (Dem. | GOP) |
| 15 | Michigan (Dem. | GOP) |
| 19 | Nevada caucuses (Dem. | GOP), South Carolina (GOP) |
| 26 | South Carolina (Dem.) |
| 29 | Florida (Dem. | GOP) |
| February |
| 2 | Maine caucus (GOP) |
| 5 | Alabama (Dem. | GOP), Alaska caucuses (Dem. | GOP), Arizona (Dem. | GOP), Arkansas (Dem. | GOP), California (Dem. | GOP), Colorado caucuses (Dem. | GOP), Connecticut (Dem. | GOP), Delaware (Dem. | GOP), Georgia (Dem. | GOP), Idaho caucus (Dem.), Illinois (Dem. | GOP), Kansas caucus (Dem.), Massachusetts (Dem. | GOP), Minnesota caucuses (Dem. | GOP), Missouri (Dem. | GOP), Montana caucus (GOP), New Jersey (Dem. | GOP), New Mexico caucus (Dem.), New York (Dem. | GOP), North Dakota caucuses (Dem. | GOP), Oklahoma (Dem. | GOP), Tennessee (Dem. | GOP), Utah (Dem. | GOP), West Virginia (GOP) |
| 9 | Kansas caucus (GOP), Louisiana (Dem. | GOP caucus), Nebraska caucus (Dem.) | Washington caucus (Dem., GOP) |
| 10 | Maine caucus (Dem.) |
| 12 | District of Columbia (Dem. | GOP) | Maryland (Dem. | GOP), Virginia (Dem. | GOP) |
| 19 | Hawaii caucus (Dem.), Washington (Dem. | GOP), Wisconsin (Dem. | GOP) |
| March |
| 4 | Ohio (Dem. | GOP), Rhode Island (Dem. | GOP), Texas (Dem. | GOP), Vermont (Dem. | GOP) |
8 | Wyoming caucus (Dem.) | |
| 11 | Mississippi (Dem. | GOP) |
| April |
| 22 | Pennsylvania (Dem. | GOP) |
| May |
| 3 | Guam (Dem.) |
| 6 | Indiana (Dem. | GOP), North Carolina (Dem. | GOP) |
| 13 | Nebraska (GOP), West Virginia (Dem.) |
| 20 | Kentucky (Dem. | GOP), Oregon (Dem. | GOP) |
| 27 | Idaho (GOP) |
| TBD | Hawaii caucus (GOP) |
| June |
| 1 | Puerto Rico (Dem.) |
| 3 | Montana (Dem.), New Mexico (GOP), South Dakota (Dem. | GOP) |
| November |
| 4 | U.S. General Election |
