alpharetta,_georgia | ispartof | georgia_(us_state) <sep> alpharetta is a city in northern fulton county, georgia, united states, and is a part of the atlanta metropolitan area as of the 2020 us census, alpharetta's population was 65,818; in 2010, the population was 57,551 
alpharetta is part of the u.s. state. georgia.alpharetta is a city in northern fulton county, georgia, united states