• county
  • FIPS 18015
  • Largest town: Delphi

Carroll County, Indiana

Carroll County had 20,747 residents in the Census Vintage 2024 estimate, on 372.2 square miles of land. It ranks 70th of 92 in Indiana by population and 64th by land area.

Population
20,747
#70 of 92 in Indiana · #1,785 in US
Area
372.2 sq mi
#64 of 92 in Indiana · #2,626 in US
Density
56 / sq mi
#70 of 92 in Indiana · #1,368 in US
Median household income
$71,740
#26 of 92 in Indiana · #873 in US

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

Carroll County within Indiana. Pin: Indianapolis.

Measure from here

Tools and pages that start from Carroll County

Carroll County population, land area and income

Carroll County had 20,747 residents in the Census Vintage 2024 estimate, on 372.2 square miles of land. It ranks 70th of 92 in Indiana by population and 64th by land area. That works out to 55.7 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; Carroll County is somewhat smaller.

Its SAIPE 2023 median household income of $71,740 is above the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

20,747

3144th1st

1785th of 3,144 (US)

Land area

372 sq mi

3144th1st

2626th of 3,144 (US)

Density

55.7 / sq mi

3144th1st

1368th of 3,144 (US)

Median household income

$71,740

3143rd1st

873rd of 3,143 (US)

Rank within Indiana (92)

Population

20,747

92nd1st

70th of 92 (IN)

Land area

372 sq mi

92nd1st

64th of 92 (IN)

Density

55.7 / sq mi

92nd1st

70th of 92 (IN)

Median household income

$71,740

92nd1st

26th of 92 (IN)

How Carroll County's population changed since 2020

Carroll County gained 416 residents between the July 2020 and July 2024 estimates, a rise of 2.0%. That ranks 22nd 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, Carroll County recorded 964 births and 922 deaths, a natural change of +42. Net international migration added +74 and net domestic migration, people moving to or from other US counties, came to +335. The largest single component was domestic migration, which added 335 people.

20.3k202020.5k202120.5k202220.6k202320.7k2024
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
964
Deaths
922
Net international migration
+74
Net domestic migration
+335
Change, July 2023 to July 2024
+177

Where Carroll County is

The Census internal point of Carroll County is at 40.585000, -86.565100. 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 Carroll 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: Carroll County internal point. Dark pin: Indianapolis.

Internal point

Decimal
40.585000, -86.565100
DMS
40°35'6.00"N 86°33'54.36"W
UTM
16N 536804.3E 4492780.7N
Geohash
dp4qyhm0y
Plus code
86GMHCPM+2X

Towns in Carroll County

2 incorporated places of 1,000+ people have residents in Carroll County, 5,135 people together, or 25% of the county. Each figure counts only the part of the town inside Carroll County; towns marked "part" extend into another county. The largest is Delphi with 3,018.

  1. 01Delphi3,018
  2. 02Flora2,117
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Carroll County

The Census 2024 county adjacency file lists 5 neighbors for Carroll County. The most populous is Tippecanoe County, IN, with 191,650 residents. Distances run between Census internal points in a straight line.

Distance to Indianapolis and the nearest big city

Indianapolis is 60.3 miles SSE of Carroll County's internal point in a straight line. The nearest place of 100,000 or more is Carmel, IN (population 103,606), 48.1 miles away. The nearest place of 10,000 or more is Logansport, IN (population 18,168), 15.8 miles away.

Carroll County FIPS code

The FIPS code of Carroll County is 18015: state code 18 for Indiana plus county code 015. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $71,740.

Questions people ask

What is the population of Carroll County, Indiana?

The Census Vintage 2024 estimate for July 1, 2024 is 20,747. That is up 416 people (2.0%) from the July 2020 estimate of 20,331.

What is the FIPS code of Carroll County?

18015. The first two digits (18) are Indiana; the last three (015) identify the county.

What is the largest town in Carroll County?

Delphi, with 3,018 residents inside Carroll County in 2024.

Which counties border Carroll County?

5 county-equivalents border it in the Census 2024 adjacency file: Tippecanoe County, IN; Howard County, IN; Cass County, IN; Clinton County, IN; White County, IN.

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.