East Cobb, Georgia - Wikipedia is in unincorporated area east of Marietta & west of Roswell and Sandy Springs. It’s over here somewhere: OpenStreetMap
Is it possible to map this out? I’ve added it to Missing/Broken Cities Tracker - Google Sheets just in case…
Related, there’s probably some/one more area(s) north of Marietta & east of Kennesaw and south of Woodstock.