List of Famous people born in Sion, Switzerland

Estelle Balet was a Swiss freeride snowboarder and two-time world champion in 2015 and 2016 at the Freeride World Tour. She died in an avalanche on 19 April 2016, at the age of 21.

Stéphane Udry is an astronomer at the Geneva Observatory in Switzerland, whose current work is primarily the search for extra-solar planets. He and his team, in 2007, discovered a possibly terrestrial planet in the habitable zone of the Gliese 581 planetary system, approximately 20 light years away in the constellation Libra. He also led the observational team that discovered HD 85512 b, another most promisingly habitable exoplanet.

Ludovic Magnin is a Swiss former footballer and current manager. He is the manager of FC Zürich. He played as a left-back for the Switzerland national team, Yverdon Sport, FC Lugano, Werder Bremen, VfB Stuttgart, and FC Zürich.

Micheline Anne-Marie Calmy-Rey is a Swiss politician who served as a Member of the Swiss Federal Council from 2003 to 2011. A member of the Social Democratic Party (SP/PS), she was the head of the Federal Department of Foreign Affairs during her tenure as a Federal Councillor. She was President of the Swiss Confederation twice, in 2007 and 2011.

Walther Heinrich Wilhelm Ritz was a Swiss theoretical physicist. He is most famous for his work with Johannes Rydberg on the Rydberg–Ritz combination principle. Ritz is also known for the variational method named after him, the Ritz method.

Jonathan Fumeaux is a Swiss former racing cyclist. He rode in the 2014 Vuelta a España.