Stone Mountain, Georgia a member of Main Street America. Stone Mountain is located at (33.805255, -84.171413), at the western base of the quartz monzonite dome monadnock of the same name. While Stone Mountain city proper is completely within DeKalb County, the postal regions designated, and traditionally considered as Stone Mountain include portions of DeKalb and Gwinnett Counties. According to the State of Georgia, the city has a total area of , of which 0.62% is water. According to 2017 US Census Bureau estimates , Stone Mountain has 6,368 residents, a 9.0% increase since 2010. There are 2,519 households with an average of 2.42
Stone Mountain Freeway counties. Stone Mountain Freeway begins at an interchange with US 29/SR 8 (Lawrenceville Highway) on the Scottdale–North Decatur city line, within DeKalb County. There is no access to US 29/SR 8 north from Stone Mountain Freeway or to Stone Mountain Freeway from US 29/SR 8 south. Southwest of this interchange, US 29/US 78/SR 8 head toward Decatur. Stone Mountain Freeway travels to the northeast, concurrent with US 78 and SR 410. The concurrency has a partial interchange with Valley Brook Road and North Druid Hills Road. Just before leaving Scottdale is an interchange with Interstate 285 (I-285). Part of this