Lebern District is one of the ten districts of the canton of Solothurn, Switzerland, situated to the west of the canton. Together with the city of Solothurn, it forms the Amtei (electoral district) of Solothurn-Lebern. It has a population of (as of ). Lebern District contains the following municipalities: Includes population and area from Niederwil which became part of Riedholz in 2011 In 2011 Niederwil merged into Riedholz. Lebern has an area, , of . Of this area, or 40.0% is used for agricultural purposes, while or 43.7% is forested. Of the rest of the land, or 14.4% is settled (buildings or roads), or 1.3% is either rivers or lakes and or 0.6% is unproductive land. Of the built up area, industrial buildings made up 1.3% of the total area while housing and buildings made up 7.4% and transportation infrastructure made up 4.3%. Out of the forested land, 41.8% of the total land area is heavily forested and 1.9% is covered with orchards or small clusters of trees. Of the agricultural land, 34.2% is used for growing crops and 5.0% is used for alpine pastures. All the water in the district is flowing water. The blazon of the municipal coat of arms is Gules a Pale chevrony Or and Sable. Lebern has a population () of . Most of the population () speaks German (36,787 or 87.6%), with Italian being second most common (1,589 or 3.8%) and French being third (735 or 1.7%). There are 34 people who speak Romansh. the gender distribution of the population was 49.6% male and 50.4% female. The population was made up of 16,823 Swiss men (38.8% of the population) and 4,659 (10.8%) non-Swiss men. There were 17,730 Swiss women (40.9%) and 4,102 (9.5%) non-Swiss women. Of the population in the district 12,874 or about 30.6% were born in Lebern and lived there in 2000. There were 10,524 or 25.1% who were born in the same canton, while 10,380 or 24.7% were born somewhere else in Switzerland, and 6,853 or 16.3% were born outside of Switzerland. In there were 255 live births to Swiss citizens and 72 births to non-Swiss citizens, and in same time span there were 387 deaths of Swiss citizens and 17 non-Swiss citizen deaths.