• county
  • FIPS 17065
  • Largest town: McLeansboro

Hamilton County, Illinois

Hamilton County had 7,818 residents in the Census Vintage 2024 estimate, on 434.7 square miles of land. It ranks 89th of 102 in Illinois by population and 66th by land area.

Population
7,818
#89 of 102 in Illinois · #2,588 in US
Area
434.7 sq mi
#66 of 102 in Illinois · #2,333 in US
Density
18 / sq mi
#96 of 102 in Illinois · #2,308 in US
Median household income
$65,472
#53 of 102 in Illinois · #1,342 in US

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

Hamilton County within Illinois. Pin: Springfield.

Measure from here

Tools and pages that start from Hamilton County

Hamilton County population, land area and income

Hamilton County had 7,818 residents in the Census Vintage 2024 estimate, on 434.7 square miles of land. It ranks 89th of 102 in Illinois by population and 66th by land area. That works out to 18.0 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, so Hamilton County has 32% of the typical county's population.

Its SAIPE 2023 median household income of $65,472 is above the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

7,818

3144th1st

2588th of 3,144 (US)

Land area

435 sq mi

3144th1st

2333rd of 3,144 (US)

Density

18.0 / sq mi

3144th1st

2308th of 3,144 (US)

Median household income

$65,472

3143rd1st

1342nd of 3,143 (US)

Rank within Illinois (102)

Population

7,818

102nd1st

89th of 102 (IL)

Land area

435 sq mi

102nd1st

66th of 102 (IL)

Density

18.0 / sq mi

102nd1st

96th of 102 (IL)

Median household income

$65,472

102nd1st

53rd of 102 (IL)

How Hamilton County's population changed since 2020

Hamilton County lost 175 residents between the July 2020 and July 2024 estimates, a drop of 2.2%. That ranks 63rd 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, Hamilton County recorded 321 births and 493 deaths, a natural change of -172. Net international migration added -4 and net domestic migration, people moving to or from other US counties, came to +3. The largest single component was natural change, which removed 172 people.

7,99320207,90820217,97620227,88620237,8182024
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
321
Deaths
493
Net international migration
-4
Net domestic migration
+3
Change, July 2023 to July 2024
-68

Where Hamilton County is

The Census internal point of Hamilton County is at 38.085200, -88.539000. It sits in UTM zone 16N. The map shades Illinois's 102 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Hamilton 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: Hamilton County internal point. Dark pin: Springfield.

Internal point

Decimal
38.085200, -88.539000
DMS
38°05'6.72"N 88°32'20.40"W
UTM
16N 365032.5E 4216386.5N
Geohash
dnc09jpy7
Plus code
86CH3FP6+3C

Towns in Hamilton County

One incorporated place of 1,000+ people has residents in Hamilton County, 2,593 people together, or 33% of the county. Each figure counts only the part of the town inside Hamilton County; towns marked "part" extend into another county. The largest is McLeansboro with 2,593.

  1. 01McLeansboro2,593
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Hamilton County

The Census 2024 county adjacency file lists 6 neighbors for Hamilton County. The most populous is Franklin County, IL, with 37,033 residents. Distances run between Census internal points in a straight line.

Distance to Springfield and the nearest big city

Springfield is 131.5 miles NNW of Hamilton County's internal point in a straight line. The nearest place of 100,000 or more is Evansville, IN (population 115,395), 55.1 miles away. The nearest place of 10,000 or more is Mount Vernon, IL (population 14,162), 25.9 miles away.

Hamilton County FIPS code

The FIPS code of Hamilton County is 17065: state code 17 for Illinois plus county code 065. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $65,472.

Questions people ask

What is the population of Hamilton County, Illinois?

The Census Vintage 2024 estimate for July 1, 2024 is 7,818. That is down 175 people (2.2%) from the July 2020 estimate of 7,993.

What is the FIPS code of Hamilton County?

17065. The first two digits (17) are Illinois; the last three (065) identify the county.

What is the largest town in Hamilton County?

McLeansboro, with 2,593 residents inside Hamilton County in 2024.

Which counties border Hamilton County?

6 county-equivalents border it in the Census 2024 adjacency file: Franklin County, IL; Jefferson County, IL; Saline County, IL; Wayne County, IL; White County, IL; Gallatin 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.