• county
  • FIPS 19061
  • Largest town: Dubuque

Dubuque County, Iowa

Dubuque County had 99,242 residents in the Census Vintage 2024 estimate, on 608.3 square miles of land. It ranks 9th of 99 in Iowa by population and 21st by land area.

Population
99,242
#9 of 99 in Iowa · #625 in US
Area
608.3 sq mi
#21 of 99 in Iowa · #1,596 in US
Density
163 / sq mi
#8 of 99 in Iowa · #650 in US
Median household income
$72,749
#33 of 99 in Iowa · #807 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Dubuque County within Iowa. Pin: Des Moines.

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Tools and pages that start from Dubuque County

Dubuque County population, land area and income

Dubuque County had 99,242 residents in the Census Vintage 2024 estimate, on 608.3 square miles of land. It ranks 9th of 99 in Iowa by population and 21st by land area. That works out to 163.1 people per square mile, 1.7 times the US average of 96.3, and in the top quarter nationally.

The median county-equivalent in Iowa has 15,008 residents, so Dubuque County is 6.6 times that size.

Its SAIPE 2023 median household income of $72,749 is above the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

99,242

3144th1st

625th of 3,144 (US)

Land area

608 sq mi

3144th1st

1596th of 3,144 (US)

Density

163.1 / sq mi

3144th1st

650th of 3,144 (US)

Median household income

$72,749

3143rd1st

807th of 3,143 (US)

Rank within Iowa (99)

Population

99,242

99th1st

9th of 99 (IA)

Land area

608 sq mi

99th1st

21st of 99 (IA)

Density

163.1 / sq mi

99th1st

8th of 99 (IA)

Median household income

$72,749

99th1st

33rd of 99 (IA)

How Dubuque County's population changed since 2020

Dubuque County lost 68 residents between the July 2020 and July 2024 estimates, a drop of 0.1%. That ranks 44th of 99 in Iowa for growth. The median Iowa county changed by -0.6%, and the state as a whole by +1.6%.

Since the April 2020 estimates base, Dubuque County recorded 4,689 births and 4,495 deaths, a natural change of +194. Net international migration added +801 and net domestic migration, people moving to or from other US counties, came to -1,042. The largest single component was domestic migration, which removed 1,042 people.

99.3k202098.9k202198.7k202299.0k202399.2k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
4,689
Deaths
4,495
Net international migration
+801
Net domestic migration
-1,042
Change, July 2023 to July 2024
+254

Where Dubuque County is

The Census internal point of Dubuque County is at 42.463500, -90.878800. It sits in UTM zone 15N. The map shades Iowa's 99 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Dubuque County outlined. Dots are towns of 1,000+ people with residents in it.

Monroe County: -2.9%Worth County: -1.7%Buena Vista County: +0.0%Jasper County: +0.8%Van Buren County: -0.0%Hardin County: -2.2%Ida County: -3.1%Marshall County: +0.8%Fayette County: -1.5%Ringgold County: -0.8%Wapello County: +1.0%Webster County: -0.2%Adams County: -2.8%Buchanan County: +0.6%Cerro Gordo County: -1.2%Lucas County: +1.6%Emmet County: -1.9%Floyd County: -3.8%Crawford County: -0.7%Linn County: +0.6%Montgomery County: -2.6%Polk County: +4.7%Cherokee County: +0.0%Bremer County: +1.3%Grundy County: +0.5%Adair County: -0.8%Cedar County: -1.4%Story County: +3.9%Mahaska County: -0.6%Davis County: +0.9%Clay County: +0.8%Johnson County: +4.6%Greene County: -1.0%Palo Alto County: -2.0%Benton County: +1.0%Cass County: -0.7%Wright County: -1.5%Audubon County: -2.1%Henry County: -5.3%Boone County: +0.1%Appanoose County: -1.4%Washington County: +0.4%Chickasaw County: -2.2%Poweshiek County: -0.9%Osceola County: -2.6%Wayne County: +1.8%Mitchell County: +0.4%Jefferson County: +0.5%Union County: -1.4%Butler County: -1.2%Hancock County: -1.3%Marion County: +1.9%Delaware County: +0.9%Humboldt County: +0.2%Sioux County: +1.8%Des Moines County: -1.1%O'Brien County: +0.8%Clayton County: -0.6%Black Hawk County: +1.0%Winnebago County: -2.6%Harrison County: +0.4%Decatur County: -1.0%Pocahontas County: -0.9%Lyon County: +3.8%Iowa County: -1.4%Franklin County: +0.3%Dickinson County: +2.2%Madison County: +3.2%Allamakee County: +0.8%Jones County: +2.2%Carroll County: -1.6%Kossuth County: -2.6%Hamilton County: -1.0%Howard County: -1.4%Page County: -1.1%Guthrie County: +1.5%Tama County: -1.8%Monona County: -3.6%Clarke County: -2.1%Lee County: -3.4%Mills County: +2.1%Sac County: -2.7%Scott County: +0.6%Keokuk County: -1.6%Jackson County: -0.3%Warren County: +7.1%Calhoun County: -1.9%Shelby County: +0.8%Fremont County: -1.1%Dubuque County: -0.1%Louisa County: -1.8%Taylor County: -0.6%Woodbury County: +1.2%Clinton County: -0.9%Winneshiek County: -1.6%Pottawattamie County: -0.1%Plymouth County: +0.5%Muscatine County: -2.4%Dallas County: +14.7%
Change 2020 to 2024
  1. < -1.9%
  2. < -1.0%
  3. < +0.0%
  4. < +0.9%
  5. ≥ +0.9%
no data

Orange pin: Dubuque County internal point. Dark pin: Des Moines.

Internal point

Decimal
42.463500, -90.878800
DMS
42°27'48.60"N 90°52'43.68"W
UTM
15N 674395.7E 4703420.2N
Geohash
9zx3s40pf
Plus code
86JFF47C+CF

Towns in Dubuque County

7 incorporated places of 1,000+ people have residents in Dubuque County, 77,246 people together, or 78% of the county. Each figure counts only the part of the town inside Dubuque County; towns marked "part" extend into another county. The largest is Dubuque with 58,987.

  1. 01Dubuque58,987
  2. 02Asbury6,051
  3. 03Dyersville (part)4,250
  4. 04Peosta2,195
  5. 05Epworth2,042
  6. 06Cascade (part)1,998
  7. 07Farley1,723
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Dubuque County

The Census 2024 county adjacency file lists 6 neighbors for Dubuque County, including 2 across a state line. The most populous is Grant County, WI, with 52,330 residents. Distances run between Census internal points in a straight line.

Distance to Des Moines and the nearest big city

Des Moines is 152.3 miles WSW of Dubuque County's internal point in a straight line. The nearest place of 100,000 or more is Cedar Rapids, IA (population 137,904), 53.6 miles away. The nearest place of 10,000 or more is Dubuque, IA (population 58,987), 9.1 miles away.

Dubuque County FIPS code

The FIPS code of Dubuque County is 19061: state code 19 for Iowa plus county code 061. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $72,749.

Questions people ask

What is the population of Dubuque County, Iowa?

The Census Vintage 2024 estimate for July 1, 2024 is 99,242. That is down 68 people (0.1%) from the July 2020 estimate of 99,310.

What is the FIPS code of Dubuque County?

19061. The first two digits (19) are Iowa; the last three (061) identify the county.

What is the largest town in Dubuque County?

Dubuque, with 58,987 residents inside Dubuque County in 2024.

Which counties border Dubuque County?

6 county-equivalents border it in the Census 2024 adjacency file: Grant County, WI; Jo Daviess County, IL; Jones County, IA; Jackson County, IA; Delaware County, IA; Clayton County, IA.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.