Plaines Wilhems is a district of Mauritius. It is the most populous district, with an estimated population of 366,506 at the end of 2018. The district is mainly urban; it consists of four towns, the village of Midlands and part of two other villages. The Plaines Wilhems district does not have a District Council; it has four Municipal Town Councils. The towns are Beau-Bassin Rose-Hill, Curepipe, Quatre Bornes and Vacoas-Phoenix. The villages are Midlands, Cascavelle and Moka. The district was named after Wilhem Leicknig. Of Prussian origin, he settled on the island of Mauritius, then known as Isle de France, in 1721.

Mauritius, officially the Republic of Mauritius, is an island country in the Indian Ocean, about 2,000 kilometres off the southeastern coast of East Africa, east of Madagascar. It includes the main island, as well as Rodrigues, Agaléga, and St. Brandon. The islands of Mauritius and Rodrigues, along with nearby Réunion, are part of the Mascarene Islands. The main island of Mauritius, where the population is concentrated, hosts the capital and largest city, Port Louis. The country spans 2,040 square kilometres (790 sq mi) and has an exclusive economic zone covering 2,300,000 square kilometres.