The Gillioz Theatre is a historic theater located at Springfield, Missouri, United States.

Gillioz managed to secure a 100-year lease on one 16-foot (4.9 m) wide piece of property which bordered on U.S. Route 66, so that the theater could garner patrons who traveled on that historic highway.

It hosts a variety of entertainment such as Dave Chappelle, Elvis Costello, George Clinton, Ben Folds, Parliament Funkadelic, Blue October, Kacey Musgraves, Billy Ray Cyrus and many more.

Factually, the theatre did have a death on New Year's Eve 1962 when the projectionist died at his post prior to starting a midnight screening.

Eighty years after first opening its doors, the Gillioz had a grand reopening in October 2006 known as Encore 2006.

The historic Gillioz has experienced a strong resurgence, including being named top event venue by both 417 magazine and the Springfield Newsleader.

In 2017 the Gillioz was named a top 5 event venue under 4000 seats by the Academy of Country Music.