Dassa-Zoumé, also known as Igbó Ìdàáshà or simply Dassa, is a city in central Benin, on the Cotonou-to-Parakou railway and the main north-south highway. It is the capital of Collines Department. The commune covers an area of 1,711 square kilometres (661 sq mi), and as of 2013 had a population of 112,118.

Collines is one of the twelve departments of Benin, located in the centre of the country. The department of Collines was created in 1999 when it was split off from Zou Department. In 2016, the city of Dassa-Zoumé became the department's capital.