IO West, Comedy theater in Hollywood, US

iO West was a comedy theater at 6366 Hollywood Blvd in Los Angeles, opened by Paul Vaillancourt in 1997 as the Los Angeles branch of Chicago's ImprovOlympic. From 2000 it occupied a purpose-built space in the Palmer Building, with a 99-seat main stage, the 70-seat Del Close Experimental Black Box and the 40-seat Loft Space.

The theater opened in 1997 as the Los Angeles branch of the Chicago-based ImprovOlympic and moved to its best-known address on Hollywood Boulevard in 2000. It stayed open for nearly twenty years before closing in 2018.

iO West was the Los Angeles branch of Chicago's iO, formerly ImprovOlympic, founded in 1981 by Del Close and Charna Halpern. Its alumni include Amy Poehler and Stephen Colbert, and the theater hosted the Los Angeles Improv Comedy Festival. The name changed from ImprovOlympic to iO in 2001 after the International Olympic Committee threatened legal action.

The theater sat in the heart of Hollywood's entertainment district, within walking distance of many hotels and landmarks in the area. Since several shows ran each evening, it was worth checking in advance which performances were scheduled and at what time.

The theater hosted the Los Angeles Improv Comedy Festival. Its last home was a purpose-built space in the Palmer Building at 6366 Hollywood Blvd, where it operated from 2000 until closing on February 24, 2018. Before that it occupied the Stella Adler Theater and The Complex Theater.