The Geneva Observatory (French: Observatoire de Genève, German: Observatorium von Genf) is an astronomical observatory at Sauverny (CH) in the municipality of Versoix , Canton of Geneva , in Switzerland . It shares its buildings with the astronomy department of the École Polytechnique Fédérale de Lausanne . It has been active in discovering exoplanets, in stellar photometry, modelling stellar evolution, and has been involved in the European Space Agency's Hipparcos, INTEGRAL, Gaia, and Planck missions.

In 1995, the first exoplanet found orbiting a main-sequence star, 51 Pegasi b, was discovered by two scientists of the observatory, Michel Mayor and Didier Queloz, using the radial velocity method with the 1.9-metre telescope at Haute-Provence Observatory in France. Mayor and Queloz were awarded (half of) the Nobel Prize in Physics 2019 for this discovery.

In addition to a 1-metre telescope located at the French Haute-Provence Observatory (but owned by Geneva Observatory), the Geneva Observatory also operates the 1.2-metre Leonhard Euler Telescope.