• county
  • FIPS 18077
  • Largest town: Madison

Jefferson County, Indiana

Jefferson County had 32,921 residents in the Census Vintage 2024 estimate, on 360.7 square miles of land. It ranks 51st of 92 in Indiana by population and 69th by land area.

Population
32,921
#51 of 92 in Indiana · #1,370 in US
Area
360.7 sq mi
#69 of 92 in Indiana · #2,650 in US
Density
91 / sq mi
#45 of 92 in Indiana · #980 in US
Median household income
$62,153
#63 of 92 in Indiana · #1,627 in US

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

Jefferson County within Indiana. Pin: Indianapolis.

Measure from here

Tools and pages that start from Jefferson County

Jefferson County population, land area and income

Jefferson County had 32,921 residents in the Census Vintage 2024 estimate, on 360.7 square miles of land. It ranks 51st of 92 in Indiana by population and 69th by land area. That works out to 91.3 people per square mile, near the US average of 96.3, and above the national county median.

The median county-equivalent in Indiana has 34,874 residents, about the same as Jefferson County.

Its SAIPE 2023 median household income of $62,153 is below the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

32,921

3144th1st

1370th of 3,144 (US)

Land area

361 sq mi

3144th1st

2650th of 3,144 (US)

Density

91.3 / sq mi

3144th1st

980th of 3,144 (US)

Median household income

$62,153

3143rd1st

1627th of 3,143 (US)

Rank within Indiana (92)

Population

32,921

92nd1st

51st of 92 (IN)

Land area

361 sq mi

92nd1st

69th of 92 (IN)

Density

91.3 / sq mi

92nd1st

45th of 92 (IN)

Median household income

$62,153

92nd1st

63rd of 92 (IN)

How Jefferson County's population changed since 2020

Jefferson County lost 182 residents between the July 2020 and July 2024 estimates, a drop of 0.5%. That ranks 81st of 92 in Indiana for growth. The median Indiana county changed by +0.8%, and the state as a whole by +2.0%.

Since the April 2020 estimates base, Jefferson County recorded 1,367 births and 1,916 deaths, a natural change of -549. Net international migration added +155 and net domestic migration, people moving to or from other US counties, came to +151. The largest single component was natural change, which removed 549 people.

33.1k202033.1k202132.9k202232.9k202332.9k2024
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
1,367
Deaths
1,916
Net international migration
+155
Net domestic migration
+151
Change, July 2023 to July 2024
-17

Where Jefferson County is

The Census internal point of Jefferson County is at 38.783600, -85.440100. It sits in UTM zone 16N. The map shades Indiana's 92 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Jefferson County outlined. Dots are towns of 1,000+ people with residents in it.

Vigo County: +0.0%Fayette County: -0.1%Grant County: -0.1%Noble County: +0.7%Clay County: -0.0%Fulton County: -2.3%Henry County: +0.3%Jasper County: +1.5%Carroll County: +2.0%Huntington County: +0.8%Howard County: +0.6%Tipton County: -0.4%Starke County: +0.3%Lawrence County: +0.4%Jennings County: +0.2%Jay County: -1.5%Greene County: +1.3%Blackford County: -2.4%Madison County: +3.1%Parke County: +2.1%DeKalb County: +2.4%Scott County: +1.5%Benton County: +1.7%Wells County: +2.3%Wabash County: -0.5%Union County: -2.8%Marshall County: +0.8%Putnam County: +3.1%Clinton County: -0.8%Hamilton County: +8.8%Hancock County: +10.8%Jackson County: +2.0%Hendricks County: +8.5%Johnson County: +5.1%Decatur County: -0.2%Lake County: +0.8%Newton County: +2.5%Fountain County: +2.1%Crawford County: +0.0%Perry County: +0.9%Martin County: +0.6%Dearborn County: +1.3%Morgan County: +2.8%Monroe County: +0.0%Switzerland County: +2.5%Ohio County: +1.2%Sullivan County: -0.2%Franklin County: +1.5%Adams County: +2.0%Jefferson County: -0.5%Knox County: -1.1%Ripley County: +0.8%Vanderburgh County: +0.0%Gibson County: -0.1%LaGrange County: +1.5%Dubois County: -0.0%Harrison County: +0.8%Randolph County: -0.3%Brown County: +1.1%Shelby County: +1.3%Tippecanoe County: +2.8%Daviess County: +2.2%Delaware County: +1.1%Elkhart County: +0.2%Whitley County: +1.6%Allen County: +3.4%Montgomery County: +1.8%Miami County: -0.8%St. Joseph County: +0.4%Kosciusko County: +0.6%Floyd County: +1.8%Rush County: -0.1%Wayne County: -0.2%Posey County: -0.5%Clark County: +5.0%Orange County: -0.1%Marion County: +0.5%Boone County: +10.7%Porter County: +1.5%Steuben County: +1.2%Vermillion County: +0.8%Cass County: -0.6%Owen County: +2.5%White County: +0.6%Washington County: +0.4%Pulaski County: -0.8%Pike County: -1.1%Warren County: +0.3%Warrick County: +3.7%Spencer County: +1.8%LaPorte County: -0.8%Bartholomew County: +3.1%
Change 2020 to 2024
  1. < -0.2%
  2. < +0.4%
  3. < +1.2%
  4. < +2.1%
  5. ≥ +2.1%
no data

Orange pin: Jefferson County internal point. Dark pin: Indianapolis.

Internal point

Decimal
38.783600, -85.440100
DMS
38°47'0.96"N 85°26'24.36"W
UTM
16N 635488.6E 4293918.3N
Geohash
dnghxu26v
Plus code
86CPQHM5+CX

Towns in Jefferson County

2 incorporated places of 1,000+ people have residents in Jefferson County, 15,935 people together, or 48% of the county. Each figure counts only the part of the town inside Jefferson County; towns marked "part" extend into another county. The largest is Madison with 12,108.

  1. 01Madison12,108
  2. 02Hanover3,827
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Jefferson County

The Census 2024 county adjacency file lists 7 neighbors for Jefferson County, including 2 across a state line. The most populous is Clark County, IN, with 127,479 residents. Distances run between Census internal points in a straight line.

Distance to Indianapolis and the nearest big city

Indianapolis is 78.2 miles NNW of Jefferson County's internal point in a straight line. The nearest place of 100,000 or more is Louisville/Jefferson County, KY (population 640,796), 44.2 miles away. The nearest place of 10,000 or more is Madison, IN (population 12,108), 2.9 miles away.

Jefferson County FIPS code

The FIPS code of Jefferson County is 18077: state code 18 for Indiana plus county code 077. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $62,153.

Questions people ask

What is the population of Jefferson County, Indiana?

The Census Vintage 2024 estimate for July 1, 2024 is 32,921. That is down 182 people (0.5%) from the July 2020 estimate of 33,103.

What is the FIPS code of Jefferson County?

18077. The first two digits (18) are Indiana; the last three (077) identify the county.

What is the largest town in Jefferson County?

Madison, with 12,108 residents inside Jefferson County in 2024.

Which counties border Jefferson County?

7 county-equivalents border it in the Census 2024 adjacency file: Clark County, IN; Ripley County, IN; Jennings County, IN; Scott County, IN; Carroll County, KY; Switzerland County, IN; Trimble County, KY.

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.