The Sunset 4A Region is a part of the Nevada Interscholastic Activities Association and is one of two conferences in Southern Nevada 4A high school athletics. The Sunset Region consists of large schools in the western parts of Las Vegas and North Las Vegas and Pahrump, Nevada. There are two division in the Sunset 4A Region, Northwest and Southwest. The Sunset 4A Region was a part of the Southern Nevada 4-A Region, until the conference was divided into two separate regions due to the constant expansion and development of new high schools in the Las Vegas metro.