McKenzie Arena (also called The Roundhouse) is the primary basketball arena for the University of Tennessee at Chattanooga in Chattanooga in the U.S. state of Tennessee. It replaced Maclellan Gymnasium, a 4,177-seat gymnasium now used for women's volleyball and wrestling. Originally called UTC Arena, it was renamed McKenzie Arena on February 21, 2000 in honor of athletic supporters Toby and Brenda McKenzie of Cleveland, Tennessee.

The 10,928-seat arena was opened on October 8, 1982. The first season included a visit by then defending national NCAA champion North Carolina Tar Heels, a team which included Michael Jordan, Brad Daugherty, and Sam Perkins. The arena hosted the 2005 and 2011 men's Southern Conference basketball tournament and the 2005 women's tournament championship game. In addition to basketball, the arena has hosted many ice shows, rodeos, circuses, truck rallies, and wrestling events. The arena is also home to UTC's department of intercollegiate athletics.

The arena can also accommodate concerts, with a 64-by-48-foot stage and capacities of 7,463 for side-stage shows, 9,107 end-stage and 11,557 center-stage shows; ice shows, circuses and even monster truck rallies (arena floor dimensions are 151'6" by 181'9").