The 2023 Tailteann Cup was the second edition of the Tailteann Cup and is the second-tier of Gaelic football for senior county teams (the All-Ireland Senior Football Championship is the first-tier trophy).

It was contested by seventeen teams who failed to reach their provincial final including New York.

These teams initially competed in their provincial championship and if they reached their provincial final, they continued in the 2023 All-Ireland Senior Football Championship, progressing to the All-Ireland group stage.

The winner of the 2023 Tailteann Cup qualify for the group stage of 2024 All-Ireland Senior Football Championship regardless of their league position.

The participating teams, listed by province, with numbers in parentheses indicating final positions in the 2023 National Football League before the championship were: Britain (1) Connacht (1) Leinster (7) Munster (3) Ulster (4) America (1) Relegated from the All-Ireland Senior Football Championship Promoted to the All-Ireland Senior Football Championship Seventeen county teams competed in the Tailteann Cup: Numbers in brackets indicate ranking in the 2023 NFL.