The history of Mbuji-Mayi is inextricably linked to one of the most valuable natural resources — diamonds. Emerging in the early 20th century as a small mining settlement, the city rapidly transformed into one of the major centres of the Democratic Republic of the Congo and the world capital of industrial diamond mining.
The city was founded in 1914 on lands traditionally belonging to the Bakwanga clan and originally bore the name Bakwanga. Its emergence was a direct consequence of the discovery of colossal diamond deposits in the region. The development of the settlement was entirely initiated by the Belgian mining company Société minière de Bakwanga (MIBA), which organised a camp here for its employees. Thus, the main factor in the city's establishment was its unique location — it was built directly atop one of the world's largest deposits of industrial diamonds.
It received its modern name, which translates from the local Tshiluba language as "Goat Water", in 1966. This refers to the Mbuji-Mayi River, which served as an important watering hole for livestock. From the very beginning, the economy was single-industry and entirely oriented towards the extraction and export of diamonds. MIBA managed not only the mines but also the entire civic life, turning Mbuji-Mayi into a classic "company town". By the 1960s, local production accounted for up to 80% of the world's volume of industrial diamonds.
Early Mbuji-Mayi (then Bakwanga) was a strictly zoned settlement with a utilitarian character, divided into residential quarters for workers, administrative districts, and mining zones under the full control of MIBA. A sharp population increase occurred after the country gained independence in 1960. During this period, the city became an important centre for the Luba people, which triggered mass migration and led to a significant increase in the number of its inhabitants. It was they who formed the foundation of the city's cultural environment, distinguishing it from many other colonial centres.