• county
  • FIPS 18153
  • Largest town: Sullivan

Sullivan County, Indiana

Sullivan County had 20,768 residents in the Census Vintage 2024 estimate, on 447.2 square miles of land. It ranks 69th of 92 in Indiana by population and 21st by land area.

Population
20,768
#69 of 92 in Indiana · #1,782 in US
Area
447.2 sq mi
#21 of 92 in Indiana · #2,280 in US
Density
46 / sq mi
#80 of 92 in Indiana · #1,540 in US
Median household income
$59,148
#81 of 92 in Indiana · #1,917 in US

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

Sullivan County within Indiana. Pin: Indianapolis.

Measure from here

Tools and pages that start from Sullivan County

Sullivan County population, land area and income

Sullivan County had 20,768 residents in the Census Vintage 2024 estimate, on 447.2 square miles of land. It ranks 69th of 92 in Indiana by population and 21st by land area. That works out to 46.4 people per square mile, below the US average of 96.3, and above the national county median.

The median county-equivalent in Indiana has 34,874 residents; Sullivan County is somewhat smaller.

Its SAIPE 2023 median household income of $59,148 is below the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

20,768

3144th1st

1782nd of 3,144 (US)

Land area

447 sq mi

3144th1st

2280th of 3,144 (US)

Density

46.4 / sq mi

3144th1st

1540th of 3,144 (US)

Median household income

$59,148

3143rd1st

1917th of 3,143 (US)

Rank within Indiana (92)

Population

20,768

92nd1st

69th of 92 (IN)

Land area

447 sq mi

92nd1st

21st of 92 (IN)

Density

46.4 / sq mi

92nd1st

80th of 92 (IN)

Median household income

$59,148

92nd1st

81st of 92 (IN)

How Sullivan County's population changed since 2020

Sullivan County lost 51 residents between the July 2020 and July 2024 estimates, a drop of 0.2%. That ranks 76th 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, Sullivan County recorded 905 births and 1,088 deaths, a natural change of -183. Net international migration added +12 and net domestic migration, people moving to or from other US counties, came to +113. The largest single component was natural change, which removed 183 people.

20.8k202020.8k202120.7k202220.8k202320.8k2024
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
905
Deaths
1,088
Net international migration
+12
Net domestic migration
+113
Change, July 2023 to July 2024
-54

Where Sullivan County is

The Census internal point of Sullivan County is at 39.089200, -87.415800. 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 Sullivan 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: Sullivan County internal point. Dark pin: Indianapolis.

Internal point

Decimal
39.089200, -87.415800
DMS
39°05'21.12"N 87°24'56.88"W
UTM
16N 464040.3E 4326757.6N
Geohash
dncy6gcz0
Plus code
86FJ3HQM+MM

Towns in Sullivan County

3 incorporated places of 1,000+ people have residents in Sullivan County, 6,417 people together, or 31% of the county. Each figure counts only the part of the town inside Sullivan County; towns marked "part" extend into another county. The largest is Sullivan with 4,240.

  1. 01Sullivan4,240
  2. 02Shelburn1,111
  3. 03Farmersburg1,066
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Sullivan County

The Census 2024 county adjacency file lists 6 neighbors for Sullivan County, including 2 across a state line. The most populous is Vigo County, IN, with 106,166 residents. Distances run between Census internal points in a straight line.

Distance to Indianapolis and the nearest big city

Indianapolis is 81.9 miles NE of Sullivan County's internal point in a straight line. The nearest place of 100,000 or more is Evansville, IN (population 115,395), 76.4 miles away. The nearest place of 10,000 or more is Terre Haute, IN (population 58,531), 26.0 miles away.

Sullivan County FIPS code

The FIPS code of Sullivan County is 18153: state code 18 for Indiana plus county code 153. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $59,148.

Questions people ask

What is the population of Sullivan County, Indiana?

The Census Vintage 2024 estimate for July 1, 2024 is 20,768. That is down 51 people (0.2%) from the July 2020 estimate of 20,819.

What is the FIPS code of Sullivan County?

18153. The first two digits (18) are Indiana; the last three (153) identify the county.

What is the largest town in Sullivan County?

Sullivan, with 4,240 residents inside Sullivan County in 2024.

Which counties border Sullivan County?

6 county-equivalents border it in the Census 2024 adjacency file: Vigo County, IN; Knox County, IN; Greene County, IN; Clay County, IN; Crawford County, IL; Clark 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.