In much of the 20th century, when Gwinnett County was still rural, Duluth was known in the area as being one of the few small towns with its own hospital, Joan Glancy Memorial Hospital. Consequently, many older residents of the area who call other towns home were actually born in Duluth. Joan Glancy was replaced with Gwinnett Medical Center – Duluth in 2006. The site of the old Joan Glancy hospital is now GMC's Glancy Campus, home to the Glancy Rehabilitation Center, the Duluth location of GMC's Diabetes & Nutrition Education Center and the Duluth location of GMC's Center for Sleep Disorder.