| Lomami District | |
| Settlement Type: | District |
| Pushpin Map: | Democratic Republic of the Congo |
| Coordinates: | -6.1333°N 24.4833°W |
| Subdivision Type: | Country |
| Subdivision Name: | Belgian Congo |
| Subdivision Type1: | Province |
| Subdivision Name1: | Katanga |
| Subdivision Type2: | District |
| Subdivision Name2: | Lomami |
| Leader Title: | District commissioner |
Lomami District (fr|District du Lomami, nl|District Lomami) was a district of the Belgian Congo from 1912 to 1933, when it was dissolved.It covered very roughly the same area as the present Lomami Province and the northwest of Haut-Lomami Province.
Parts of the Stanley Falls and Lualaba districts were combined to form Katanga in 1910, which was called a vice-government general.An arrêté royal of 28 March 1912 divided the Congo into 22 districts.A map of the colony after this division shows Lomami District bordering Atlas général du Congo}}The district was named after the Lomami River, whose upper reaches flowed northward through the district.
Katanga become a vice-government in 1913.It contained the districts of Lomami, Tanganika-Moero, Lulua and Haut-Luapula.In 1933 the provinces were reorganized into six provinces, named after their capitals, and the central government assumed more control.Katanga became Elisabethville Province.The number of districts was reduced to 15, with 102 territories.Lomami was divided among Sankuru District, Lualaba District and Tanganika District.
In 2015 Lomami Province was formed from the Kabinda district and the independently administered city of Mwene-Ditu. The town of Kabinda was elevated to capital city of the new province.Haut-Lomami was formed from the Haut-Lomami district, whose town of Kamina was elevated to capital city of the new province.