• county
  • FIPS 18133
  • Largest town: Greencastle

Putnam County, Indiana

Putnam County had 37,804 residents in the Census Vintage 2024 estimate, on 480.5 square miles of land. It ranks 40th of 92 in Indiana by population and 15th by land area.

Population
37,804
#40 of 92 in Indiana · #1,245 in US
Area
480.5 sq mi
#15 of 92 in Indiana · #2,154 in US
Density
79 / sq mi
#50 of 92 in Indiana · #1,091 in US
Median household income
$73,137
#23 of 92 in Indiana · #775 in US

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

Putnam County within Indiana. Pin: Indianapolis.

Measure from here

Tools and pages that start from Putnam County

Putnam County population, land area and income

Putnam County had 37,804 residents in the Census Vintage 2024 estimate, on 480.5 square miles of land. It ranks 40th of 92 in Indiana by population and 15th by land area. That works out to 78.7 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 Putnam County.

Its SAIPE 2023 median household income of $73,137 is in the top quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

37,804

3144th1st

1245th of 3,144 (US)

Land area

481 sq mi

3144th1st

2154th of 3,144 (US)

Density

78.7 / sq mi

3144th1st

1091st of 3,144 (US)

Median household income

$73,137

3143rd1st

775th of 3,143 (US)

Rank within Indiana (92)

Population

37,804

92nd1st

40th of 92 (IN)

Land area

481 sq mi

92nd1st

15th of 92 (IN)

Density

78.7 / sq mi

92nd1st

50th of 92 (IN)

Median household income

$73,137

92nd1st

23rd of 92 (IN)

How Putnam County's population changed since 2020

Putnam County gained 1,122 residents between the July 2020 and July 2024 estimates, a rise of 3.1%. That ranks 11th 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, Putnam County recorded 1,538 births and 1,912 deaths, a natural change of -374. Net international migration added +259 and net domestic migration, people moving to or from other US counties, came to +1,193. The largest single component was domestic migration, which added 1,193 people.

36.7k202037.0k202137.3k202237.6k202337.8k2024
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
1,538
Deaths
1,912
Net international migration
+259
Net domestic migration
+1,193
Change, July 2023 to July 2024
+226

Where Putnam County is

The Census internal point of Putnam County is at 39.665500, -86.853400. 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 Putnam 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: Putnam County internal point. Dark pin: Indianapolis.

Internal point

Decimal
39.665500, -86.853400
DMS
39°39'55.80"N 86°51'12.24"W
UTM
16N 512574.6E 4390642.3N
Geohash
dp41xsgk3
Plus code
86FMM48W+6J

Towns in Putnam County

2 incorporated places of 1,000+ people have residents in Putnam County, 12,079 people together, or 32% of the county. Each figure counts only the part of the town inside Putnam County; towns marked "part" extend into another county. The largest is Greencastle with 9,907.

  1. 01Greencastle9,907
  2. 02Cloverdale2,172
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Putnam County

The Census 2024 county adjacency file lists 6 neighbors for Putnam County. The most populous is Hendricks County, IN, with 190,629 residents. Distances run between Census internal points in a straight line.

Distance to Indianapolis and the nearest big city

Indianapolis is 37.6 miles E of Putnam County's internal point in a straight line. The nearest place of 100,000 or more is Indianapolis, IN (population 891,484), 38.4 miles away. The nearest place of 10,000 or more is Danville, IN (population 12,532), 20.1 miles away.

Putnam County FIPS code

The FIPS code of Putnam County is 18133: state code 18 for Indiana plus county code 133. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $73,137.

Questions people ask

What is the population of Putnam County, Indiana?

The Census Vintage 2024 estimate for July 1, 2024 is 37,804. That is up 1,122 people (3.1%) from the July 2020 estimate of 36,682.

What is the FIPS code of Putnam County?

18133. The first two digits (18) are Indiana; the last three (133) identify the county.

What is the largest town in Putnam County?

Greencastle, with 9,907 residents inside Putnam County in 2024.

Which counties border Putnam County?

6 county-equivalents border it in the Census 2024 adjacency file: Hendricks County, IN; Morgan County, IN; Montgomery County, IN; Clay County, IN; Owen County, IN; Parke 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.