The Asia Australia NBL1 (National Basketball League 1) is a professional basketball league in Australia.

It was established in 2019 and is the second-tier men’s basketball league in the country, after the top-tier National Basketball League (NBL).

The league comprises of 18 teams from different states and territories of Australia, which compete in a regular season from March to August, followed by playoffs to determine the league champion. The NBL1 is known for its high level of competition, with many talented players and teams competing for the chance to move up to the top-tier NBL. The league provides an opportunity for emerging players to showcase their skills and attract the attention of scouts from top leagues around the world.