The Bemba are Zambia’s largest ethnic group, roughly a fifth of the population, concentrated in the country’s Northern, Luapula, and Copperbelt provinces. Oral tradition traces their origin to the Luba and Lunda states of the upper Congo basin, from which their ancestors migrated into present-day Zambia before 1740.
Bemba is Zambia's most widely spoken indigenous language and functions as a lingua franca among Zambians whose first languages differ, even though it's the mother tongue of only about a third of the population.