Collines ([kɔ.lin], "hills") is one of the twelve departments of Benin, located in the centre of the country.

[5] Dassa-Zoumé is the departmental capital; other major settlements include Glazoué, Kilibo, Savalou and Savè.

[6] The main ethnic groups in the department, according to the latest national census, are the Yoruba of the Nagot group at 46.8% and the Yoruba of the Idaasha at 14.9%, followed by the Mahi at 25.7%, or just over a quarter of the region's population, while the Fon represent 13% of the population.

[8] Other ethnolinguistic groups in the department include the Aguna, Biali, Ede and Tchumbuli.

Collines is subdivided into six communes, each centered at one of the principal towns: Bantè, Dassa-Zoumé, Glazoué, Ouèssè, Savalou and Savé.

A law passed in 1999 transformed the sous-prefectures, the lowest level of territorial administration, into local governments.

[10] Municipalities and communal councils have elected representatives who manage the administration of the regions.