The Union University Bulldogs are the athletic teams that represent the Union University, located in Jackson, Tennessee, in intercollegiate sports at the Division II level of the National Collegiate Athletic Association (NCAA).

Men's sports include baseball, basketball, cross country, golf, and soccer; while women's sports include basketball, cross country, golf, soccer, softball, and volleyball.

Union began the three-year transition to full NCAA Division II membership in 2011.

They were also a member of the National Christian College Athletic Association (NCCAA), primarily competing as an independent in the Mid-East Region of the Division I level.

Union also claimed NCCAA National Titles in men's soccer (2003), volleyball (2003), and softball (2001, 2002, 2004, 2013).