According to Benin's 2013 census, the total population of the department was 622,372, with 300,065 males and 322,307 females. The proportion of women was 51.80%. The total rural population was 54.80%, while the urban population was 45.20%. The proportion of women of childbearing age (15 to 49 years old) was 24.30%. The foreign population was 2,605, representing 0.40% of the total population in the department. The
labour force participation rate among foreigners aged 15–64 years was 31.70%. The proportion of women among the foreign population constituted 42.50%. The number of households in the department was 110,532 and the average household size was 5.6. The intercensal growth rate of the population was 3.80%. Among women, the average age of first marriage was 21.4 and the average age at maternity was 28.8. The synthetic index of fertility of women was 4.7. The average number of families in a house was 1.3 and the average number of persons per room was 1.7. The total labour force in the department was 185,815, of which 43.10% were women. The proportion of households with no level of education was 65.50% and the proportion of households with children attending school was 60.00%. The crude birth rate was 36.2, the general rate of fertility was 149.10 and the gross reproduction rate was 2.30. The population is predominantly
Yoruba of the following subgroups: the Nagot group at 45.7% and the
Ohori (also known as the
Holli) at 20.9%, for a total of 66.6% of the department's population. The Yoruba group is followed by the
Fon group of the following subgroups:
Ogu at 12.4% of the population,
Fon at 8.2% of the population, and Torri at 6.5%. ==Administrative divisions==