• county
  • FIPS 18161
  • Largest town: Liberty

Union County, Indiana

Union County had 6,884 residents in the Census Vintage 2024 estimate, on 161.2 square miles of land. It ranks 91st of 92 in Indiana by population and 90th by land area.

Population
6,884
#91 of 92 in Indiana · #2,666 in US
Area
161.2 sq mi
#90 of 92 in Indiana · #3,048 in US
Density
43 / sq mi
#82 of 92 in Indiana · #1,608 in US
Median household income
$64,648
#56 of 92 in Indiana · #1,406 in US

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

Union County within Indiana. Pin: Indianapolis.

Measure from here

Tools and pages that start from Union County

Union County population, land area and income

Union County had 6,884 residents in the Census Vintage 2024 estimate, on 161.2 square miles of land. It ranks 91st of 92 in Indiana by population and 90th by land area. That works out to 42.7 people per square mile, below the US average of 96.3, and below the national county median.

The median county-equivalent in Indiana has 34,874 residents, so Union County has 20% of the typical county's population.

Its SAIPE 2023 median household income of $64,648 is above the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

6,884

3144th1st

2666th of 3,144 (US)

Land area

161 sq mi

3144th1st

3048th of 3,144 (US)

Density

42.7 / sq mi

3144th1st

1608th of 3,144 (US)

Median household income

$64,648

3143rd1st

1406th of 3,143 (US)

Rank within Indiana (92)

Population

6,884

92nd1st

91st of 92 (IN)

Land area

161 sq mi

92nd1st

90th of 92 (IN)

Density

42.7 / sq mi

92nd1st

82nd of 92 (IN)

Median household income

$64,648

92nd1st

56th of 92 (IN)

How Union County's population changed since 2020

Union County lost 195 residents between the July 2020 and July 2024 estimates, a drop of 2.8%. That ranks 92nd 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, Union County recorded 252 births and 392 deaths, a natural change of -140. Net international migration added +6 and net domestic migration, people moving to or from other US counties, came to -64. The largest single component was natural change, which removed 140 people.

7,07920207,01620216,97520226,97220236,8842024
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
252
Deaths
392
Net international migration
+6
Net domestic migration
-64
Change, July 2023 to July 2024
-88

Where Union County is

The Census internal point of Union County is at 39.623100, -84.925100. 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 Union 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: Union County internal point. Dark pin: Indianapolis.

Internal point

Decimal
39.623100, -84.925100
DMS
39°37'23.16"N 84°55'30.36"W
UTM
16N 678090.1E 4387983.3N
Geohash
dp597mpmm
Plus code
86FQJ3FF+6X

Towns in Union County

One incorporated place of 1,000+ people has residents in Union County, 1,981 people together, or 29% of the county. Each figure counts only the part of the town inside Union County; towns marked "part" extend into another county. The largest is Liberty with 1,981.

  1. 01Liberty1,981
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Union County

The Census 2024 county adjacency file lists 5 neighbors for Union County, including 2 across a state line. The most populous is Butler County, OH, with 399,542 residents. Distances run between Census internal points in a straight line.

Distance to Indianapolis and the nearest big city

Indianapolis is 66.3 miles W of Union County's internal point in a straight line. The nearest place of 100,000 or more is Dayton, OH (population 136,346), 40.1 miles away. The nearest place of 10,000 or more is Connersville, IN (population 13,282), 11.7 miles away.

Union County FIPS code

The FIPS code of Union County is 18161: state code 18 for Indiana plus county code 161. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $64,648.

Questions people ask

What is the population of Union County, Indiana?

The Census Vintage 2024 estimate for July 1, 2024 is 6,884. That is down 195 people (2.8%) from the July 2020 estimate of 7,079.

What is the FIPS code of Union County?

18161. The first two digits (18) are Indiana; the last three (161) identify the county.

What is the largest town in Union County?

Liberty, with 1,981 residents inside Union County in 2024.

Which counties border Union County?

5 county-equivalents border it in the Census 2024 adjacency file: Butler County, OH; Wayne County, IN; Preble County, OH; Fayette County, IN; Franklin 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.