| 2018 USAFL National Championships | |
| Color: | navy |
| Color Text: | white |
| League: | United States Australian Football League |
| Sport: | Australian rules football |
| Pixels: | 250px |
| Conf1: | Men |
| Conf2: | Women |
| Seasonslist: | List of USAFL National Championships |
| Seasonslistnames: | USAFL National Championships |
| Prevseason Link: | 2017 USAFL National Championships |
| Prevseason Year: | 2017 |
| Nextseason Link: | 2019 USAFL National Championships |
| Nextseason Year: | 2019 |
The 2018 USAFL National Championships were the 22nd installment of the premier United States annual Australian rules football club tournament.