• county
  • FIPS 17073
  • Largest town: Kewanee

Henry County, Illinois

Henry County had 48,177 residents in the Census Vintage 2024 estimate, on 823.1 square miles of land. It ranks 30th of 102 in Illinois by population and 15th by land area.

Population
48,177
#30 of 102 in Illinois · #1,032 in US
Area
823.1 sq mi
#15 of 102 in Illinois · #1,029 in US
Density
59 / sq mi
#40 of 102 in Illinois · #1,323 in US
Median household income
$73,198
#25 of 102 in Illinois · #772 in US

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

Henry County within Illinois. Pin: Springfield.

Measure from here

Tools and pages that start from Henry County

Henry County population, land area and income

Henry County had 48,177 residents in the Census Vintage 2024 estimate, on 823.1 square miles of land. It ranks 30th of 102 in Illinois by population and 15th by land area. That works out to 58.5 people per square mile, below the US average of 96.3, and above the national county median.

The median county-equivalent in Illinois has 24,447 residents; Henry County is somewhat larger.

Its SAIPE 2023 median household income of $73,198 is in the top quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

48,177

3144th1st

1032nd of 3,144 (US)

Land area

823 sq mi

3144th1st

1029th of 3,144 (US)

Density

58.5 / sq mi

3144th1st

1323rd of 3,144 (US)

Median household income

$73,198

3143rd1st

772nd of 3,143 (US)

Rank within Illinois (102)

Population

48,177

102nd1st

30th of 102 (IL)

Land area

823 sq mi

102nd1st

15th of 102 (IL)

Density

58.5 / sq mi

102nd1st

40th of 102 (IL)

Median household income

$73,198

102nd1st

25th of 102 (IL)

How Henry County's population changed since 2020

Henry County lost 1,001 residents between the July 2020 and July 2024 estimates, a drop of 2.0%. That ranks 58th 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, Henry County recorded 1,951 births and 2,556 deaths, a natural change of -605. Net international migration added +25 and net domestic migration, people moving to or from other US counties, came to -535. The largest single component was natural change, which removed 605 people.

49.2k202048.9k202148.6k202248.4k202348.2k2024
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
1,951
Deaths
2,556
Net international migration
+25
Net domestic migration
-535
Change, July 2023 to July 2024
-185

Where Henry County is

The Census internal point of Henry County is at 41.350000, -90.130800. 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 Henry 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: Henry County internal point. Dark pin: Springfield.

Internal point

Decimal
41.350000, -90.130800
DMS
41°21'0.00"N 90°07'50.88"W
UTM
15N 740036.1E 4581584.0N
Geohash
9zrgjp8c0
Plus code
86HF9V29+2M

Towns in Henry County

7 incorporated places of 1,000+ people have residents in Henry County, 29,926 people together, or 62% of the county. Each figure counts only the part of the town inside Henry County; towns marked "part" extend into another county. The largest is Kewanee with 12,146.

  1. 01Kewanee12,146
  2. 02Geneseo6,503
  3. 03Colona4,960
  4. 04Galva2,396
  5. 05Cambridge2,034
  6. 06Orion1,714
  7. 07Coal Valley (part)173
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Henry County

The Census 2024 county adjacency file lists 6 neighbors for Henry County. The most populous is Rock Island County, IL, with 142,731 residents. Distances run between Census internal points in a straight line.

Distance to Springfield and the nearest big city

Springfield is 111.3 miles SSE of Henry County's internal point in a straight line. The nearest place of 100,000 or more is Davenport, IA (population 100,938), 28.3 miles away. The nearest place of 10,000 or more is Kewanee, IL (population 12,146), 13.1 miles away.

Henry County FIPS code

The FIPS code of Henry County is 17073: state code 17 for Illinois plus county code 073. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $73,198.

Questions people ask

What is the population of Henry County, Illinois?

The Census Vintage 2024 estimate for July 1, 2024 is 48,177. That is down 1,001 people (2.0%) from the July 2020 estimate of 49,178.

What is the FIPS code of Henry County?

17073. The first two digits (17) are Illinois; the last three (073) identify the county.

What is the largest town in Henry County?

Kewanee, with 12,146 residents inside Henry County in 2024.

Which counties border Henry County?

6 county-equivalents border it in the Census 2024 adjacency file: Rock Island County, IL; Whiteside County, IL; Knox County, IL; Bureau County, IL; Mercer County, IL; Stark 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.