Graf is a city in Dubuque County, Iowa, United States. It is part of the 'Dubuque, Iowa Metropolitan Statistical Area'. The population was 7…Graf is a city in Dubuque County, Iowa, United States. It is part of the 'Dubuque, Iowa Metropolitan Statistical Area'. The population was 76 at the time of the 2020 census, up from 73 in 2000. Graf is located at 42°29′42″N 90°52′19″W / 42.49500°N 90.87194°W.