• county
  • FIPS 18029
  • Largest town: Lawrenceburg

Dearborn County, Indiana

Dearborn County had 51,435 residents in the Census Vintage 2024 estimate, on 305.1 square miles of land. It ranks 28th of 92 in Indiana by population and 81st by land area.

Population
51,435
#28 of 92 in Indiana · #987 in US
Area
305.1 sq mi
#81 of 92 in Indiana · #2,802 in US
Density
169 / sq mi
#25 of 92 in Indiana · #632 in US
Median household income
$82,578
#7 of 92 in Indiana · #382 in US

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

Dearborn County within Indiana. Pin: Indianapolis.

Measure from here

Tools and pages that start from Dearborn County

Dearborn County population, land area and income

Dearborn County had 51,435 residents in the Census Vintage 2024 estimate, on 305.1 square miles of land. It ranks 28th of 92 in Indiana by population and 81st by land area. That works out to 168.6 people per square mile, 1.8 times the US average of 96.3, and in the top quarter nationally.

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

Its SAIPE 2023 median household income of $82,578 is in the top quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

51,435

3144th1st

987th of 3,144 (US)

Land area

305 sq mi

3144th1st

2802nd of 3,144 (US)

Density

168.6 / sq mi

3144th1st

632nd of 3,144 (US)

Median household income

$82,578

3143rd1st

382nd of 3,143 (US)

Rank within Indiana (92)

Population

51,435

92nd1st

28th of 92 (IN)

Land area

305 sq mi

92nd1st

81st of 92 (IN)

Density

168.6 / sq mi

92nd1st

25th of 92 (IN)

Median household income

$82,578

92nd1st

7th of 92 (IN)

How Dearborn County's population changed since 2020

Dearborn County gained 679 residents between the July 2020 and July 2024 estimates, a rise of 1.3%. That ranks 36th 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, Dearborn County recorded 2,051 births and 2,454 deaths, a natural change of -403. Net international migration added +52 and net domestic migration, people moving to or from other US counties, came to +1,091. The largest single component was domestic migration, which added 1,091 people.

50.8k202050.9k202151.0k202251.4k202351.4k2024
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
2,051
Deaths
2,454
Net international migration
+52
Net domestic migration
+1,091
Change, July 2023 to July 2024
+21

Where Dearborn County is

The Census internal point of Dearborn County is at 39.140900, -84.975900. 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 Dearborn 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: Dearborn County internal point. Dark pin: Indianapolis.

Internal point

Decimal
39.140900, -84.975900
DMS
39°08'27.24"N 84°58'33.24"W
UTM
16N 674929.7E 4334363.5N
Geohash
dngwdm6kq
Plus code
86FQ42RF+9J

Towns in Dearborn County

4 incorporated places of 1,000+ people have residents in Dearborn County, 14,699 people together, or 29% of the county. Each figure counts only the part of the town inside Dearborn County; towns marked "part" extend into another county. The largest is Lawrenceburg with 5,216.

  1. 01Lawrenceburg5,216
  2. 02Greendale4,581
  3. 03Aurora3,515
  4. 04Dillsboro1,387
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Dearborn County

The Census 2024 county adjacency file lists 6 neighbors for Dearborn County, including 3 across a state line. The most populous is Hamilton County, OH, with 837,359 residents. Distances run between Census internal points in a straight line.

Distance to Indianapolis and the nearest big city

Indianapolis is 76.6 miles NW of Dearborn County's internal point in a straight line. The nearest place of 100,000 or more is Cincinnati, OH (population 314,915), 25.2 miles away. The nearest place of 10,000 or more is Harrison, OH (population 13,526), 12.9 miles away.

Dearborn County FIPS code

The FIPS code of Dearborn County is 18029: state code 18 for Indiana plus county code 029. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $82,578.

Questions people ask

What is the population of Dearborn County, Indiana?

The Census Vintage 2024 estimate for July 1, 2024 is 51,435. That is up 679 people (1.3%) from the July 2020 estimate of 50,756.

What is the FIPS code of Dearborn County?

18029. The first two digits (18) are Indiana; the last three (029) identify the county.

What is the largest town in Dearborn County?

Lawrenceburg, with 5,216 residents inside Dearborn County in 2024.

Which counties border Dearborn County?

6 county-equivalents border it in the Census 2024 adjacency file: Hamilton County, OH; Butler County, OH; Boone County, KY; Ripley County, IN; Franklin County, IN; Ohio 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.