Koko Jazz Club, founded in 2010, is a Finnish jazz organisation with clubs in both Helsinki and Iisalmi. The Koko Jazz Support Association, founded in 2015, serves as the club's background organisation. In 2017, a separate association was founded in Iisalmi.

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Koko Jazz Club has a high-quality jazz programme; the concert offering is divided into different series curated by distinguished jazz experts. The artistic director is jazz musician Timo Hirvonen.

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Koko Jazz Club is also more than just a club or a concert hall – Koko Jazz is a community of professional jazz musicians. Koko Jazz Club has filled a jazz-shaped void in the Helsinki region's music offering and among its venues. For years, Helsinki was the only Nordic capital without a professional main stage for jazz.

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Koko Jazz Club clearly stands out from other clubs in that it operates as a professional
event organiser, employer and content producer. Koko Jazz Club is not a commercial company or a restaurant, but a non-profit public-benefit arts organisation. Koko Jazz Club also differs from other actors in that it is not merely a place where someone else brings the content.

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Koko Jazz Club's focus areas are concert series, audiovisual productions, co-productions and guest performances, cooperation with educational institutions, audience engagement, and developing musicians' own work and collaboration.