State primaries vary from state to state. These dates are tentative and subject to change. For update information, go the the Federal Election Commission.
| STATE | PRIMARY DATE | CAUCUS DATE |
| Alabama | March 8, 2016 | n/a |
| Alaska | n/a | March 6, 2016 (R); April 15, 2016 (D) |
| American Samoa | n/a | TBD |
| Arizona | March 22, 2016 | n/a |
| Arkansas | May 24, 2016 | n/a |
| California | June 7, 2016 | n/a |
| Colorado | n/a | TBD |
| Connecticut | April 26, 2016 | n/a |
| Delaware | April 26, 2016 | n/a |
| D.C. | April 5, 2016 | n/a |
| Florida | March 15, 2016 | n/a |
| Georgia | TBD | n/a |
| Guam | n/a | TBD |
| Hawaii | n/a | March 8, 2016 |
| Idaho | n/a | TBD |
| Illinois | March 15, 2016 | n/a |
| Indiana | May 3, 2016 | n/a |
| Iowa | n/a | February 2, 2016 (R) February 1, 2016 (D) |
| Kansas | n/a | TBD |
| Kentucky | May 17, 2016 | n/a |
| Louisiana | March 5, 2016 | n/a |
| Maine | n/a | TBD |
| Maryland | April 5, 2016 | n/a |
| Massachusetts | March 1, 2016 | n/a |
| Michigan | February 28, 2016 | n/a |
| Minnesota | n/a | TBD |
| Mississippi | March 13, 2016 | n/a |
| Missouri | March 15, 2016 | n/a |
| Montana | June 7, 2016 | n/a |
| Nebraska | May 10, 2016 | n/a |
| Nevada | n/a | February 23, 2016 |
| New Hampshire | February 9, 2016 | n/a |
| New Jersey | June 7, 2016 | n/a |
| New Mexico | June 7, 2016 | n/a |
| New York | TBD | n/a |
| North Carolina | March 1, 2016 | n/a |
| North Dakota | n/a | March 6, 2016 (R); June 5, 2016 (D) |
| Ohio | March 6, 2016 | n/a |
| Oklahoma | March 1, 2016 | n/a |
| Oregon | May 17, 2016 | n/a |
| Pennsylvania | April 26, 2016 | n/a |
| Puerto Rico | March 13, 2016 | n/a |
| Rhode Island | April 26, 2016 | n/a |
| South Carolina | February 20, 2016 | n/a |
| South Dakota | June 7, 2016 | n/a |
| Tennessee | March 1, 2016 | n/a |
| Texas | March 1, 2016 | n/a |
| Utah | TBD | n/a |
| Vermont | March 1, 2016 | n/a |
| Virginia | March 1, 2016 | n/a |
| Virgin Islands | n/a | February 10, 2016 |
| Washington | TBD | n/a |
| West Virginia | May 10, 2016 | n/a |
| Wisconsin | April 5, 2016 | n/a |
| Wyoming | n/a | TBD |
Source: Federal Election Commission, Updated May 11, 2015 |
- More from Campaign 2016
