East Dubuque is a city in Jo Daviess County, Illinois, United States. The population was 1,505 at the 2020 census, down from 1,704 in 2010. …East Dubuque is a city in Jo Daviess County, Illinois, United States. The population was 1,505 at the 2020 census, down from 1,704 in 2010. East Dubuque is located alongside the Mississippi River. Across the river is the city of Dubuque, Iowa. The city limits extend along the river to the Illinois-Wisconsin border.
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