• county
  • FIPS 18001
  • Largest town: Decatur

Adams County, Indiana

Adams County had 36,584 residents in the Census Vintage 2024 estimate, on 338.9 square miles of land. It ranks 43rd of 92 in Indiana by population and 71st by land area.

Population
36,584
#43 of 92 in Indiana · #1,279 in US
Area
338.9 sq mi
#71 of 92 in Indiana · #2,715 in US
Density
108 / sq mi
#37 of 92 in Indiana · #856 in US
Median household income
$66,567
#48 of 92 in Indiana · #1,246 in US

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

Adams County within Indiana. Pin: Indianapolis.

Measure from here

Tools and pages that start from Adams County

Adams County population, land area and income

Adams County had 36,584 residents in the Census Vintage 2024 estimate, on 338.9 square miles of land. It ranks 43rd of 92 in Indiana by population and 71st by land area. That works out to 107.9 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 Adams County.

Its SAIPE 2023 median household income of $66,567 is above the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

36,584

3144th1st

1279th of 3,144 (US)

Land area

339 sq mi

3144th1st

2715th of 3,144 (US)

Density

107.9 / sq mi

3144th1st

856th of 3,144 (US)

Median household income

$66,567

3143rd1st

1246th of 3,143 (US)

Rank within Indiana (92)

Population

36,584

92nd1st

43rd of 92 (IN)

Land area

339 sq mi

92nd1st

71st of 92 (IN)

Density

107.9 / sq mi

92nd1st

37th of 92 (IN)

Median household income

$66,567

92nd1st

48th of 92 (IN)

How Adams County's population changed since 2020

Adams County gained 719 residents between the July 2020 and July 2024 estimates, a rise of 2.0%. That ranks 24th 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, Adams County recorded 2,801 births and 1,447 deaths, a natural change of +1,354. Net international migration added +108 and net domestic migration, people moving to or from other US counties, came to -710. The largest single component was natural change, which added 1,354 people.

35.9k202036.0k202136.2k202236.5k202336.6k2024
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
2,801
Deaths
1,447
Net international migration
+108
Net domestic migration
-710
Change, July 2023 to July 2024
+115

Where Adams County is

The Census internal point of Adams County is at 40.745700, -84.936100. 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 Adams 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: Adams County internal point. Dark pin: Indianapolis.

Internal point

Decimal
40.745700, -84.936100
DMS
40°44'44.52"N 84°56'9.96"W
UTM
16N 674248.2E 4512576.9N
Geohash
dp5xg1x2v
Plus code
86GQP3W7+7H

Towns in Adams County

3 incorporated places of 1,000+ people have residents in Adams County, 15,669 people together, or 43% of the county. Each figure counts only the part of the town inside Adams County; towns marked "part" extend into another county. The largest is Decatur with 10,072.

  1. 01Decatur10,072
  2. 02Berne4,310
  3. 03Geneva1,287
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Adams County

The Census 2024 county adjacency file lists 5 neighbors for Adams County, including 2 across a state line. The most populous is Allen County, IN, with 399,295 residents. Distances run between Census internal points in a straight line.

Distance to Indianapolis and the nearest big city

Indianapolis is 93.3 miles SW of Adams County's internal point in a straight line. The nearest place of 100,000 or more is Fort Wayne, IN (population 273,203), 26.0 miles away. The nearest place of 10,000 or more is Decatur, IN (population 10,072), 5.8 miles away.

Adams County FIPS code

The FIPS code of Adams County is 18001: state code 18 for Indiana plus county code 001. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $66,567.

Questions people ask

What is the population of Adams County, Indiana?

The Census Vintage 2024 estimate for July 1, 2024 is 36,584. That is up 719 people (2.0%) from the July 2020 estimate of 35,865.

What is the FIPS code of Adams County?

18001. The first two digits (18) are Indiana; the last three (001) identify the county.

What is the largest town in Adams County?

Decatur, with 10,072 residents inside Adams County in 2024.

Which counties border Adams County?

5 county-equivalents border it in the Census 2024 adjacency file: Allen County, IN; Mercer County, OH; Van Wert County, OH; Wells County, IN; Jay 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.