Billy Greer (born January 26, 1952)[1] is an American musician who was the bass guitarist for the rock band Kansas from 1985 to 2024.

He joined the band when they reformed, making his debut appearance on 1986's Power.

He also was a member of the 2009 Kansas side project Native Window along with Kansas members Phil Ehart, Richard Williams, and David Ragsdale.

In addition to performing, Greer manages his son's band 3 Story Fall and produces their music.

This article about a United States bass guitarist is a stub.