The term "millionaire city" or "millionaire capital" in West Virginia historically refers to affluent communities such as Lewisburg or specific residential neighborhoods in Charleston and Morgantown, where concentrations of wealth tied to historic coal barons, medical professionals, and corporate executives developed. Additionally, historic boomtowns like Bramwell in Mercer County famously boasted more millionaires per capita than almost anywhere else in the United States during the peak of the late 19th and early 20th-century coal and railroad boom, leaving behind a legacy of grand Victorian mansions.