Durango is a city in Dubuque County, Iowa, United States. It is part of the Dubuque, Iowa Metropolitan Statistical Area. The population was 20 …Durango is a city in Dubuque County, Iowa, United States. It is part of the Dubuque, Iowa Metropolitan Statistical Area. The population was 20 at the time of the 2020 census, down from 24 in 2000. Durango is located at 42°33′36″N 90°46′33″W / 42.56000°N 90.77583°W.