• county
  • FIPS 18103
  • Largest town: Peru

Miami County, Indiana

Miami County had 35,613 residents in the Census Vintage 2024 estimate, on 373.8 square miles of land. It ranks 45th of 92 in Indiana by population and 61st by land area.

Population
35,613
#45 of 92 in Indiana · #1,302 in US
Area
373.8 sq mi
#61 of 92 in Indiana · #2,622 in US
Density
95 / sq mi
#43 of 92 in Indiana · #947 in US
Median household income
$59,297
#80 of 92 in Indiana · #1,905 in US

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

Miami County within Indiana. Pin: Indianapolis.

Measure from here

Tools and pages that start from Miami County

Miami County population, land area and income

Miami County had 35,613 residents in the Census Vintage 2024 estimate, on 373.8 square miles of land. It ranks 45th of 92 in Indiana by population and 61st by land area. That works out to 95.3 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 Miami County.

Its SAIPE 2023 median household income of $59,297 is below the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

35,613

3144th1st

1302nd of 3,144 (US)

Land area

374 sq mi

3144th1st

2622nd of 3,144 (US)

Density

95.3 / sq mi

3144th1st

947th of 3,144 (US)

Median household income

$59,297

3143rd1st

1905th of 3,143 (US)

Rank within Indiana (92)

Population

35,613

92nd1st

45th of 92 (IN)

Land area

374 sq mi

92nd1st

61st of 92 (IN)

Density

95.3 / sq mi

92nd1st

43rd of 92 (IN)

Median household income

$59,297

92nd1st

80th of 92 (IN)

How Miami County's population changed since 2020

Miami County lost 293 residents between the July 2020 and July 2024 estimates, a drop of 0.8%. That ranks 84th 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, Miami County recorded 1,423 births and 1,926 deaths, a natural change of -503. Net international migration added +46 and net domestic migration, people moving to or from other US counties, came to +93. The largest single component was natural change, which removed 503 people.

35.9k202036.0k202135.6k202235.5k202335.6k2024
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
1,423
Deaths
1,926
Net international migration
+46
Net domestic migration
+93
Change, July 2023 to July 2024
+136

Where Miami County is

The Census internal point of Miami County is at 40.772900, -86.044300. 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 Miami 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: Miami County internal point. Dark pin: Indianapolis.

Internal point

Decimal
40.772900, -86.044300
DMS
40°46'22.44"N 86°02'39.48"W
UTM
16N 580651.6E 4513986.6N
Geohash
dp4zfn2rq
Plus code
86GMQXF4+57

Towns in Miami County

2 incorporated places of 1,000+ people have residents in Miami County, 11,878 people together, or 33% of the county. Each figure counts only the part of the town inside Miami County; towns marked "part" extend into another county. The largest is Peru with 11,003.

  1. 01Peru11,003
  2. 02Converse (part)875
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Miami County

The Census 2024 county adjacency file lists 5 neighbors for Miami County. The most populous is Howard County, IN, with 84,082 residents. Distances run between Census internal points in a straight line.

Distance to Indianapolis and the nearest big city

Indianapolis is 69.6 miles S of Miami County's internal point in a straight line. The nearest place of 100,000 or more is Fort Wayne, IN (population 273,203), 51.9 miles away. The nearest place of 10,000 or more is Peru, IN (population 11,003), 1.7 miles away.

Miami County FIPS code

The FIPS code of Miami County is 18103: state code 18 for Indiana plus county code 103. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $59,297.

Questions people ask

What is the population of Miami County, Indiana?

The Census Vintage 2024 estimate for July 1, 2024 is 35,613. That is down 293 people (0.8%) from the July 2020 estimate of 35,906.

What is the FIPS code of Miami County?

18103. The first two digits (18) are Indiana; the last three (103) identify the county.

What is the largest town in Miami County?

Peru, with 11,003 residents inside Miami County in 2024.

Which counties border Miami County?

5 county-equivalents border it in the Census 2024 adjacency file: Howard County, IN; Grant County, IN; Cass County, IN; Wabash County, IN; Fulton 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.