Mario Erb (born 16 June 1990) is a German footballer who plays as a defender for TSG 1899 Hoffenheim II.

In October 2008, he made his debut for the Bayern reserve team, replacing Daniel Sikorski in a 1–1 draw at Fortuna Düsseldorf.

With the departure of Maximilian Haas in January 2011, Erb was named as reserve team captain for the remainder of the season.

Aachen were relegated in the 2012–13 season as well, so Erb left the club in summer 2013, returning to Munich to sign for SpVgg Unterhaching.

This biographical article related to association football in Germany, about a defender born in the 1990s, is a stub.