• county
  • FIPS 17039
  • Largest town: Clinton

De Witt County, Illinois

De Witt County had 15,319 residents in the Census Vintage 2024 estimate, on 397.6 square miles of land. It ranks 69th of 102 in Illinois by population and 73rd by land area.

Population
15,319
#69 of 102 in Illinois · #2,071 in US
Area
397.6 sq mi
#73 of 102 in Illinois · #2,537 in US
Density
39 / sq mi
#61 of 102 in Illinois · #1,709 in US
Median household income
$74,553
#22 of 102 in Illinois · #696 in US

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

De Witt County within Illinois. Pin: Springfield.

Measure from here

Tools and pages that start from De Witt County

De Witt County population, land area and income

De Witt County had 15,319 residents in the Census Vintage 2024 estimate, on 397.6 square miles of land. It ranks 69th of 102 in Illinois by population and 73rd by land area. That works out to 38.5 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; De Witt County is somewhat smaller.

Its SAIPE 2023 median household income of $74,553 is in the top quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

15,319

3144th1st

2071st of 3,144 (US)

Land area

398 sq mi

3144th1st

2537th of 3,144 (US)

Density

38.5 / sq mi

3144th1st

1709th of 3,144 (US)

Median household income

$74,553

3143rd1st

696th of 3,143 (US)

Rank within Illinois (102)

Population

15,319

102nd1st

69th of 102 (IL)

Land area

398 sq mi

102nd1st

73rd of 102 (IL)

Density

38.5 / sq mi

102nd1st

61st of 102 (IL)

Median household income

$74,553

102nd1st

22nd of 102 (IL)

How De Witt County's population changed since 2020

De Witt County lost 145 residents between the July 2020 and July 2024 estimates, a drop of 0.9%. That ranks 30th 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, De Witt County recorded 627 births and 874 deaths, a natural change of -247. Net international migration added +2 and net domestic migration, people moving to or from other US counties, came to +53. The largest single component was natural change, which removed 247 people.

15.5k202015.4k202115.3k202215.3k202315.3k2024
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
627
Deaths
874
Net international migration
+2
Net domestic migration
+53
Change, July 2023 to July 2024
-12

Where De Witt County is

The Census internal point of De Witt County is at 40.181500, -88.901900. 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 De Witt 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: De Witt County internal point. Dark pin: Springfield.

Internal point

Decimal
40.181500, -88.901900
DMS
40°10'53.40"N 88°54'6.84"W
UTM
16N 338080.0E 4449636.6N
Geohash
dp0u8fzd5
Plus code
86GH53JX+J6

Towns in De Witt County

2 incorporated places of 1,000+ people have residents in De Witt County, 8,698 people together, or 57% of the county. Each figure counts only the part of the town inside De Witt County; towns marked "part" extend into another county. The largest is Clinton with 6,881.

  1. 01Clinton6,881
  2. 02Farmer City1,817
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering De Witt County

The Census 2024 county adjacency file lists 4 neighbors for De Witt County. The most populous is McLean County, IL, with 172,069 residents. Distances run between Census internal points in a straight line.

Distance to Springfield and the nearest big city

Springfield is 48.3 miles SW of De Witt County's internal point in a straight line. The nearest place of 100,000 or more is Springfield, IL (population 112,949), 47.7 miles away. The nearest place of 10,000 or more is Bloomington, IL (population 79,232), 20.6 miles away.

De Witt County FIPS code

The FIPS code of De Witt County is 17039: state code 17 for Illinois plus county code 039. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $74,553.

Questions people ask

What is the population of De Witt County, Illinois?

The Census Vintage 2024 estimate for July 1, 2024 is 15,319. That is down 145 people (0.9%) from the July 2020 estimate of 15,464.

What is the FIPS code of De Witt County?

17039. The first two digits (17) are Illinois; the last three (039) identify the county.

What is the largest town in De Witt County?

Clinton, with 6,881 residents inside De Witt County in 2024.

Which counties border De Witt County?

4 county-equivalents border it in the Census 2024 adjacency file: McLean County, IL; Macon County, IL; Logan County, IL; Piatt 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.