The district of Sion is a district of the canton of Valais in Switzerland . It has a population of 48,447 (as of 31 December 2020).

It comprises the following municipalities:

The blazon of the district coat of arms is Per pale Argent two Mullets of Five Gules, and Gules.

Sion has a population (as of December 2020) of 48,447. Most of the population (as of 2000) speaks French (31,488 or 85.1%) as their first language, German is the second most common (1,878 or 5.1%) and Portuguese is the third (1,029 or 2.8%). There are 915 people who speak Italian and 20 people who speak Romansh.

As of 2008, the gender distribution of the population was 48.3% male and 51.7% female.