| State | Voter Registration Deadline | Election Day Registration | |
|---|---|---|---|
| Alabama | Postmarked 11 days before the election. | You must register before the deadline. | Register to Vote Here |
| Alaska | Received 30 days before the election. | You must register before the deadline. | Register to Vote Here |
| Arizona | Received 29 days before the election. | You must register before the deadline. | Register to Vote Here |
| Arkansas | Postmarked 30 days before the election. | You must register before the deadline. | Register to Vote Here |
| California | Postmarked or submitted to an elections office (or NVRA voter registration agency) on or before 15 days prior to Election Day. (to vote in that election) | You must register before the deadline. | Register to Vote Here |
| Colorado | Postmarked 22 days before an election if through a voter registration drive. All other applicants may register at any time through Election Day; however, if you register after the 8th day before an election, your ballot will not automatically be mailed to you and you must appear in person to obtain your ballot. | You may also register in person on Election Day. | Register to Vote Here |
| Connecticut | Postmarked 14 days before the election or received in person 7 days before the election. | You may also register on Election Day. | Register to Vote Here |
| Delaware | Postmarked by the fourth Saturday before a general or primary election, or 10 days before a special election. | You must register before the deadline. | Register to Vote Here |
| District of Columbia | Postmarked 30 days before the election. | You may also register in person on Election Day as long as you can provide proof of residency | Register to Vote Here |
| Florida | Postmarked 29 days before the election. | You must register before the deadline. | Register to Vote Here |
| Georgia | Postmarked by the fifth Monday before the election. | You must register before the deadline. | Register to Vote Here |
| Hawaii | Received at least 30 days before the election. | You must register before the deadline. | Register to Vote Here |
| Idaho | Postmarked 25 days before the election. | You may also register in person on Election Day. | Register to Vote Here |
| Illinois | Postmarked 28 days before the election. | You must register before the deadline. | Register to Vote Here |
| Indiana | Postmarked 29 days before the election. | You must register before the deadline. | Register to Vote Here |
| Iowa | Received in-person 10 days before General and Primary Elections (11 days before all other elections), or postmarked 15 days before Election Day. | You may also register in person on Election Day. | Register to Vote Here |
| Kansas | Postmarked 21 days before the election if mailed, received at the county office 21 days before the election if delivered in person. | You must register before the deadline. | Register to Vote Here |
| Kentucky | Postmarked 29 days before the election. | You must register before the deadline. | Register to Vote Here |
| Louisiana | Received 30 days before the election. | You must register before the deadline. | Register to Vote Here |
| Maine | Received 21 days before the election. | You may also register in person on Election Day. | Register to Vote Here |
| Maryland | Postmarked 21 days before the election. | You must register before the deadline. | Register to Vote Here |
| Massachusetts | Postmarked 20 days before the election. | You must register before the deadline. | Register to Vote Here |
| Michigan | Postmarked 30 days before the election. | You must register before the deadline. | Register to Vote Here |
| Minnesota | Received 21 days before the election. | You may also register in person on Election Day as long as you can provide proof of residency. | Register to Vote Here |
| Mississippi | Postmarked 30 days before the election. | You must register before the deadline. | Register to Vote Here |
| Missouri | Received before 5pm (or normal close of business) on the fourth Wednesday prior to the election. | You must register before the deadline. | Register to Vote Here |
| Montana | Postmarked 30 days before the election. | You may also register in person at the County Clerk's office on or before Election Day. | Register to Vote Here |
| Nebraska | Postmarked by the third Friday before the election, or received in-person by 6pm on the second Friday before the election. | You must register before the deadline. | Register to Vote Here |
| Nevada | Postmarked by 31 days before the election, or submitted online by 21 days before an election, or received in-person at a clerk's office 21 days before an election. | You must register before the deadline. | Register to Vote Here |
| New Hampshire | Received 10 days before the election. | You may register in person on Election Day. | |
| New Jersey | Received 21 days before the election. | You must register before the deadline. | Register to Vote Here |
| New Mexico | Postmarked 28 days before the election. | You must register before the deadline. | Register to Vote Here |
| New York | Postmarked 25 days before the election and received no less than 20 days before the election. | You must register before the deadline. | Register to Vote Here |
| North Carolina | Received 25 day before the election. | You can register in person and vote early during the "one-stop" voting period. | Register to Vote Here |
| North Dakota | N/A | N/A | |
| Ohio | Must be postmarked 30 days before the election. | You must register before the deadline. | Register to Vote Here |
| Oklahoma | Postmarked 25 days before the election. | You must register before the deadline. | Register to Vote Here |
| Oregon | Postmarked 21 days before the election. | You must register before the deadline. | Register to Vote Here |
| Pennsylvania | Must be postmarked 30 days before the election. | You must register before the deadline. | Register to Vote Here |
| Rhode Island | Received 30 days before the election. Mailed voter registration forms received after the deadline will be accepted as long as the mail is postmarked on or before the voter registration deadline. | You may register in person on Election Day, but only for Presidential elections. | Register to Vote Here |
| South Carolina | Postmarked 30 days before the election. | You must register before the deadline. | Register to Vote Here |
| South Dakota | Received 15 days before the election. | You must register before the deadline. | Register to Vote Here |
| Tennessee | Postmarked 30 days before the election. | You must register before the deadline. | Register to Vote Here |
| Texas | Postmarked 30 days before the election. | You must register before the deadline. | Register to Vote Here |
| Utah | Postmarked 30 days before the election, or received in person 15 days before the election. | You must register before the deadline. | Register to Vote Here |
| Vermont | Received by 5pm on the Wednesday before the election. | You must register before the deadline. | Register to Vote Here |
| Virginia | Received 22 days before the election. | You must register before the deadline. | Register to Vote Here |
| Washington | Postmarked by the Monday four weeks before the election, or received in person at the county elections department the Monday one week before the election. | You must register before the deadline. | Register to Vote Here |
| West Virginia | Postmarked 21 days before the election. | You must register before the deadline. | Register to Vote Here |
| Wisconsin | Postmarked 20 days before the election. | You may also register in person on Election Day. | Register to Vote Here |
| Wyoming | Received 14 days before the election. | You may also register in person on Election Day. |