The Western Band Association (WBA) is a nonprofit organization that promotes high school music education in California, Arizona and Nevada.

Specifically, the WBA organizes marching band competitions for high school students.

The first WSMBC Championship was held in conjunction with the 1984 Music Bowl Prelims at James Logan High School.

In 1995, John Hannan (Mission Viejo High School) helped expand the organization's efforts to include Southern California bands as well.

bands have also competed under the "WBA" banner from nearby states, including Washington, Oregon, and Nevada.

In 2006, the competition schedule has grown to offer consecutive contests in each of the three Regions (Northern, Central and Southern California) helping to alleviate the costs of travel for the bands.