• county
  • FIPS 18099
  • Largest town: Plymouth

Marshall County, Indiana

Marshall County had 46,464 residents in the Census Vintage 2024 estimate, on 443.6 square miles of land. It ranks 32nd of 92 in Indiana by population and 24th by land area.

Population
46,464
#32 of 92 in Indiana · #1,062 in US
Area
443.6 sq mi
#24 of 92 in Indiana · #2,291 in US
Density
105 / sq mi
#38 of 92 in Indiana · #872 in US
Median household income
$70,390
#34 of 92 in Indiana · #969 in US

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

Marshall County within Indiana. Pin: Indianapolis.

Measure from here

Tools and pages that start from Marshall County

Marshall County population, land area and income

Marshall County had 46,464 residents in the Census Vintage 2024 estimate, on 443.6 square miles of land. It ranks 32nd of 92 in Indiana by population and 24th by land area. That works out to 104.7 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; Marshall County is somewhat larger.

Its SAIPE 2023 median household income of $70,390 is above the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

46,464

3144th1st

1062nd of 3,144 (US)

Land area

444 sq mi

3144th1st

2291st of 3,144 (US)

Density

104.7 / sq mi

3144th1st

872nd of 3,144 (US)

Median household income

$70,390

3143rd1st

969th of 3,143 (US)

Rank within Indiana (92)

Population

46,464

92nd1st

32nd of 92 (IN)

Land area

444 sq mi

92nd1st

24th of 92 (IN)

Density

104.7 / sq mi

92nd1st

38th of 92 (IN)

Median household income

$70,390

92nd1st

34th of 92 (IN)

How Marshall County's population changed since 2020

Marshall County gained 391 residents between the July 2020 and July 2024 estimates, a rise of 0.8%. That ranks 43rd 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, Marshall County recorded 2,297 births and 2,401 deaths, a natural change of -104. Net international migration added +181 and net domestic migration, people moving to or from other US counties, came to +297. The largest single component was domestic migration, which added 297 people.

46.1k202046.2k202146.4k202246.3k202346.5k2024
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
2,297
Deaths
2,401
Net international migration
+181
Net domestic migration
+297
Change, July 2023 to July 2024
+141

Where Marshall County is

The Census internal point of Marshall County is at 41.325000, -86.269000. 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 Marshall 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: Marshall County internal point. Dark pin: Indianapolis.

Internal point

Decimal
41.325000, -86.269000
DMS
41°19'30.00"N 86°16'8.40"W
UTM
16N 561175.5E 4575093.9N
Geohash
dp6ehfuzd
Plus code
86HM8PGJ+2C

Towns in Marshall County

5 incorporated places of 1,000+ people have residents in Marshall County, 20,286 people together, or 44% of the county. Each figure counts only the part of the town inside Marshall County; towns marked "part" extend into another county. The largest is Plymouth with 11,042.

  1. 01Plymouth11,042
  2. 02Bremen4,603
  3. 03Argos1,750
  4. 04Bourbon1,671
  5. 05Culver1,220
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Marshall County

The Census 2024 county adjacency file lists 6 neighbors for Marshall County. The most populous is St. Joseph County, IN, with 273,744 residents. Distances run between Census internal points in a straight line.

Distance to Indianapolis and the nearest big city

Indianapolis is 107.7 miles S of Marshall County's internal point in a straight line. The nearest place of 100,000 or more is South Bend, IN (population 103,713), 24.3 miles away. The nearest place of 10,000 or more is Plymouth, IN (population 11,042), 3.1 miles away.

Marshall County FIPS code

The FIPS code of Marshall County is 18099: state code 18 for Indiana plus county code 099. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $70,390.

Questions people ask

What is the population of Marshall County, Indiana?

The Census Vintage 2024 estimate for July 1, 2024 is 46,464. That is up 391 people (0.8%) from the July 2020 estimate of 46,073.

What is the FIPS code of Marshall County?

18099. The first two digits (18) are Indiana; the last three (099) identify the county.

What is the largest town in Marshall County?

Plymouth, with 11,042 residents inside Marshall County in 2024.

Which counties border Marshall County?

6 county-equivalents border it in the Census 2024 adjacency file: St. Joseph County, IN; Elkhart County, IN; Kosciusko County, IN; Starke County, IN; Fulton County, IN; Pulaski 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.