The Zurich Chamber Orchestra (Zürcher Kammerorchester; ZKO, German abbreviation) is a Swiss chamber orchestra based in Zurich. The ZKO's principal concert venue in Zurich is the Tonhalle. The ZKO also performs in Zurich at the Schauspielhaus Zürich, the ZKO-Haus in the Seefeld quarter of the city, and such churches as the Fraumünster and the Kirche St. Peter.

The ZKO presents approximately 40 performances in Zurich each year, in addition to approximately 40 children's concerts and performances elsewhere in Switzerland and abroad. In the 2016–2017, season the total number of concerts was 151, a record for the ZKO.

The core of the ZKO consists of 28 permanent members (string players, flute, oboe, horn, harpsichord), with other sections (woodwinds, strings, brass, harp and percussion) used as needed.