John Maurer (born July 14, 1964) played bass guitar for Social Distortion from 1984 to 2004. He was replaced by Rancid's Matt Freeman. He joined Social Distortion after the departure of Brent Liles.

In his later career he started two bands, Foxy and Fuel, while still playing for Social Distortion. He also started his own record company called Slip Records. He stated in an interview with Hm magazine that, while in Social Distortion, he became a devout Christian.