Roubaix (/roʊˈbeɪ/ roh-BAY),[2] formerly known as Perry or Lewisville, is an unincorporated community in Lawrence County, South Dakota, United States.

Roubaix was originally called Lewisville, but it was changed to Perry when the town gained a post office.

When the Chicago, Burlington and Quincy Railroad began building into the Black Hills, the town again changed its name to avoid confusion with Terry, which was nearby.

Roubaix was chosen in honor of the hometown of local Frenchman Pierre Wibaux, who was one of the Uncle Sam Mine's main investors.

[5] The grand reopening of Roubaix and its official recognition as a town was marked by a celebration in August 1885 at a beer hall, complete with a dance.

[6] In 1899, Roubaix had 500 residents, a post office, several stores, a hospital, boarding houses, a newspaper, a barber shop, a few churches, and its own city hall.

A fissure in Elk Creek was supposed, and plans were made to build a diversion dam, but it was never executed.

It is located on the east side of U.S. Route 385 along Elk Creek and is approximately seven miles south of Pluma.