 With a land area of , it had a population density of in 2016.Vulcan County's 2012 municipal census counted a population of 3,893, a 0.5% increase over its 2007 municipal census population of 3,830.In the 2011 Census, Vulcan County had a population of 3,875 living in 1,104 of its 1,433 total dwellings, a 4.2% change from its 2006 population of 3,718.