Bern-Mittelland District in the canton of Bern was created on 1 January 2010. It is part of the Bern-Mittelland administrative region, and is the only district in the region. It contains 74 municipalities with an area of and a population () of .
It is made up of the valley of the rivers Aare and Emme, some of the foothills of the Bernese Alps, as well as the plain around the capital Bern, and has many small farms and hilly forested regions with small to mid-sized towns scattered throughout.
Bern-Mittelland has a population () of . , the population was 48.3% male and 51.7% female. The population was made up of 156,642 Swiss men (40.3% of the population) and 31,135 (8.0%) non-Swiss men. There were 172,829 Swiss women (44.5%) and 2,794 (0.7%) non-Swiss women.