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Dubuque County

county in Iowa, United States

Key facts

Country: United States
State: Iowa
Founded: October 1, 1834
Named after: Julien Dubuque
Seat: Dubuque
Largest city: Dubuque
Total: 616.461 sq mi (1,596.63 km )
Land: 608.299 sq mi (1,575.49 km )
Water: 8.162 sq mi (21.14 km ) 1.32%
Estimate 2025: 99,381
Density: 163.19/sq mi (63.007/km )
Time zone: UTC−6 ( Central )
Summer dst: UTC−5 ( CDT )
Congressional district: 2nd
Website: dubuquecountyiowa.gov

via Wikipedia infobox

Article

Dubuque County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 99,266, and was estimated to be 99,381 in 2025, making it the ninth-most populous county in Iowa. The county seat is Dubuque. The county is named for Julien Dubuque, the first European settler of Iowa. Dubuque County comprises the Dubuque, Iowa Metropolitan statistical area.

History