IO Theater
| Address | Chicago, Los Angeles United States |
|---|---|
| Type | Improv theater |
| Genre(s) | Comedy |
| Opened | 1981 |
iO, or iO Chicago, (formerly known as ImprovOlympic) is an improv theater and training center in central Chicago. The theater teaches and hosts performances of improvisational comedy. It was founded in 1981 by Del Close and Charna Halpern. The theater has many notable alumni, including Amy Poehler and Stephen Colbert.
The iO Theater formerly had a branch in Los Angeles called iO West (1997-2018), and in Raleigh, North Carolina called iO South. The Chicago center closed briefly in 2020, but reopened on November 3, 2022.