• county
  • FIPS 17085
  • Largest town: Galena

Jo Daviess County, Illinois

Jo Daviess County had 21,528 residents in the Census Vintage 2024 estimate, on 600.9 square miles of land. It ranks 53rd of 102 in Illinois by population and 35th by land area.

Population
21,528
#53 of 102 in Illinois · #1,742 in US
Area
600.9 sq mi
#35 of 102 in Illinois · #1,620 in US
Density
36 / sq mi
#66 of 102 in Illinois · #1,780 in US
Median household income
$74,426
#23 of 102 in Illinois · #707 in US

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

Jo Daviess County within Illinois. Pin: Springfield.

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Jo Daviess County population, land area and income

Jo Daviess County had 21,528 residents in the Census Vintage 2024 estimate, on 600.9 square miles of land. It ranks 53rd of 102 in Illinois by population and 35th by land area. That works out to 35.8 people per square mile, below the US average of 96.3, and below the national county median.

The median county-equivalent in Illinois has 24,447 residents; Jo Daviess County is somewhat smaller.

Its SAIPE 2023 median household income of $74,426 is in the top quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

21,528

3144th1st

1742nd of 3,144 (US)

Land area

601 sq mi

3144th1st

1620th of 3,144 (US)

Density

35.8 / sq mi

3144th1st

1780th of 3,144 (US)

Median household income

$74,426

3143rd1st

707th of 3,143 (US)

Rank within Illinois (102)

Population

21,528

102nd1st

53rd of 102 (IL)

Land area

601 sq mi

102nd1st

35th of 102 (IL)

Density

35.8 / sq mi

102nd1st

66th of 102 (IL)

Median household income

$74,426

102nd1st

23rd of 102 (IL)

How Jo Daviess County's population changed since 2020

Jo Daviess County lost 570 residents between the July 2020 and July 2024 estimates, a drop of 2.6%. That ranks 74th of 102 in Illinois for growth. The median Illinois county changed by -1.7%, and the state as a whole by -0.7%.

Since the April 2020 estimates base, Jo Daviess County recorded 619 births and 1,230 deaths, a natural change of -611. Net international migration added +23 and net domestic migration, people moving to or from other US counties, came to +50. The largest single component was natural change, which removed 611 people.

22.1k202022.0k202121.9k202221.7k202321.5k2024
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
619
Deaths
1,230
Net international migration
+23
Net domestic migration
+50
Change, July 2023 to July 2024
-221

Where Jo Daviess County is

The Census internal point of Jo Daviess County is at 42.362400, -90.211500. It sits in UTM zone 15N. The map shades Illinois's 102 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Jo Daviess County outlined. Dots are towns of 1,000+ people with residents in it.

Piatt County: -0.3%Hamilton County: -2.2%Williamson County: -0.1%Edgar County: -2.4%Macoupin County: -2.3%Marshall County: -1.3%Putnam County: +0.0%Richland County: -2.8%Washington County: -1.4%Lee County: -1.5%Douglas County: +0.2%Cook County: -1.6%Effingham County: -0.3%Edwards County: -3.6%Cass County: -2.0%Clay County: -3.4%Knox County: -2.2%LaSalle County: -0.9%Cumberland County: -1.3%Warren County: -3.7%Moultrie County: -0.9%Menard County: -2.5%Fayette County: -1.5%Boone County: -0.0%Lawrence County: -3.2%Marion County: -3.2%Champaign County: +3.0%Clark County: -2.4%Ford County: -0.4%Wayne County: -1.4%Logan County: -1.4%Grundy County: +2.5%Jasper County: -1.8%Crawford County: -1.3%McDonough County: -1.7%Clinton County: +0.5%Perry County: -3.0%Montgomery County: -2.2%Henry County: -2.0%Livingston County: -1.2%Scott County: -3.8%Alexander County: -11.2%Bureau County: -2.2%Brown County: +1.1%Mason County: -3.9%Calhoun County: -4.1%Greene County: -4.3%Coles County: -1.4%Kendall County: +8.2%Lake County: +0.7%Mercer County: -2.2%St. Clair County: -2.3%Wabash County: -3.0%Bond County: -1.7%DuPage County: +0.6%Gallatin County: -5.2%Stephenson County: -3.3%McHenry County: +1.9%White County: -3.0%Saline County: -3.9%Christian County: -2.2%Sangamon County: -1.0%Massac County: -3.6%Macon County: -2.9%Johnson County: -0.0%Jo Daviess County: -2.6%Peoria County: -1.0%DeKalb County: +1.0%Pope County: -1.5%De Witt County: -0.9%Schuyler County: -1.7%Fulton County: -3.1%Ogle County: -0.8%Jersey County: -1.6%Iroquois County: -3.3%Kankakee County: -0.9%Rock Island County: -1.1%Pulaski County: -5.8%Kane County: +0.9%Union County: -2.4%Whiteside County: -1.7%Woodford County: -0.3%Carroll County: -1.5%Adams County: -2.3%Hardin County: -2.6%Madison County: -1.0%Hancock County: -3.1%Monroe County: +0.0%Tazewell County: -1.1%Jackson County: -0.1%Vermilion County: -3.9%Randolph County: -0.6%McLean County: +0.5%Morgan County: -2.6%Shelby County: -1.7%Will County: +1.7%Winnebago County: -0.4%Jefferson County: -2.4%Stark County: -2.2%Henderson County: -4.5%Pike County: -2.6%Franklin County: -1.8%
Change 2020 to 2024
  1. < -3.0%
  2. < -2.2%
  3. < -1.4%
  4. < -0.3%
  5. ≥ -0.3%
no data

Orange pin: Jo Daviess County internal point. Dark pin: Springfield.

Internal point

Decimal
42.362400, -90.211500
DMS
42°21'44.64"N 90°12'41.40"W
UTM
15N 729630.5E 4693781.1N
Geohash
9zxbgpvfz
Plus code
86JF9Q6Q+XC

Towns in Jo Daviess County

4 incorporated places of 1,000+ people have residents in Jo Daviess County, 7,608 people together, or 35% of the county. Each figure counts only the part of the town inside Jo Daviess County; towns marked "part" extend into another county. The largest is Galena with 3,207.

  1. 01Galena3,207
  2. 02Stockton1,668
  3. 03East Dubuque1,457
  4. 04Warren1,276
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Jo Daviess County

The Census 2024 county adjacency file lists 6 neighbors for Jo Daviess County, including 4 across a state line. The most populous is Dubuque County, IA, with 99,242 residents. Distances run between Census internal points in a straight line.

Distance to Springfield and the nearest big city

Springfield is 180.7 miles S of Jo Daviess County's internal point in a straight line. The nearest place of 100,000 or more is Rockford, IL (population 147,486), 59.1 miles away. The nearest place of 10,000 or more is Dubuque, IA (population 58,987), 27.0 miles away.

Jo Daviess County FIPS code

The FIPS code of Jo Daviess County is 17085: state code 17 for Illinois plus county code 085. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $74,426.

Questions people ask

What is the population of Jo Daviess County, Illinois?

The Census Vintage 2024 estimate for July 1, 2024 is 21,528. That is down 570 people (2.6%) from the July 2020 estimate of 22,098.

What is the FIPS code of Jo Daviess County?

17085. The first two digits (17) are Illinois; the last three (085) identify the county.

What is the largest town in Jo Daviess County?

Galena, with 3,207 residents inside Jo Daviess County in 2024.

Which counties border Jo Daviess County?

6 county-equivalents border it in the Census 2024 adjacency file: Dubuque County, IA; Grant County, WI; Stephenson County, IL; Jackson County, IA; Lafayette County, WI; Carroll County, IL.

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.