The district of Sierre is a district of the canton of Valais in Switzerland. It has a population of 49,427 (as of 31 December 2020).

It comprises the following municipalities:

The blazon of the district coat of arms is Gules, a Sun Or.

Sierre has a population (as of December 2020) of 49,427. Most of the population (as of 2000) speaks French (32,090 or 80.2%) as their first language, German is the second most common (3,240 or 8.1%) and Italian is the third (1,522 or 3.8%). There are 15 people who speak Romansh.

As of 2008, the gender distribution of the population was 49.2% male and 50.8% female.