Mono is one of the twelve departments of Benin. The capital of this department is Lokossa.The population of Mono is around 370,000 people. The department of Kouffo was part of Mono until 1999 when the Benin government spilt up some of the departments and made new departments. The Gen language is only spoken in this department in Benin. Other languages spoken in this area are Ewe and some of the Phla-Pherá languages.