fulton_county,_georgia | country | united_states <tsp> alpharetta,_georgia | ispartof | fulton_county,_georgia <sep> fulton county is a county located in the north-central portion of the us state of georgia as of the 2020 united states census, the population was 1,066,710, making it the state's most-populous county and its only one with over one million inhabitants its county seat and largest city is atlanta, the state capital approximately 90% of the city of atlanta is within fulton county; the other 10% lies within dekalb county 
fulton county is the location of alpharetta.georgia. in the united states.as of the 2020 united states fulton county georgia census, the population was 1,066,710