• county
  • FIPS 18141
  • Largest town: South Bend

St. Joseph County, Indiana

St. Joseph County had 273,744 residents in the Census Vintage 2024 estimate, on 457.8 square miles of land. It ranks 5th of 92 in Indiana by population and 17th by land area.

Population
273,744
#5 of 92 in Indiana · #268 in US
Area
457.8 sq mi
#17 of 92 in Indiana · #2,240 in US
Density
598 / sq mi
#6 of 92 in Indiana · #239 in US
Median household income
$65,977
#52 of 92 in Indiana · #1,300 in US

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

St. Joseph County within Indiana. Pin: Indianapolis.

Measure from here

Tools and pages that start from St. Joseph County

St. Joseph County population, land area and income

St. Joseph County had 273,744 residents in the Census Vintage 2024 estimate, on 457.8 square miles of land. It ranks 5th of 92 in Indiana by population and 17th by land area. That works out to 598.0 people per square mile, 6.2 times the US average of 96.3, and in the top tenth nationally.

The median county-equivalent in Indiana has 34,874 residents, so St. Joseph County is 7.8 times that size.

Its SAIPE 2023 median household income of $65,977 is above the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

273,744

3144th1st

268th of 3,144 (US)

Land area

458 sq mi

3144th1st

2240th of 3,144 (US)

Density

598.0 / sq mi

3144th1st

239th of 3,144 (US)

Median household income

$65,977

3143rd1st

1300th of 3,143 (US)

Rank within Indiana (92)

Population

273,744

92nd1st

5th of 92 (IN)

Land area

458 sq mi

92nd1st

17th of 92 (IN)

Density

598.0 / sq mi

92nd1st

6th of 92 (IN)

Median household income

$65,977

92nd1st

52nd of 92 (IN)

How St. Joseph County's population changed since 2020

St. Joseph County gained 1,056 residents between the July 2020 and July 2024 estimates, a rise of 0.4%. That ranks 57th 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, St. Joseph County recorded 13,594 births and 12,916 deaths, a natural change of +678. Net international migration added +4,215 and net domestic migration, people moving to or from other US counties, came to -4,157. The largest single component was international migration, which added 4,215 people.

272.7k2020272.3k2021272.8k2022273.7k2023273.7k2024
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
13,594
Deaths
12,916
Net international migration
+4,215
Net domestic migration
-4,157
Change, July 2023 to July 2024
+86

Where St. Joseph County is

The Census internal point of St. Joseph County is at 41.617700, -86.288000. 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 St. Joseph 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: St. Joseph County internal point. Dark pin: Indianapolis.

Internal point

Decimal
41.617700, -86.288000
DMS
41°37'3.72"N 86°17'16.80"W
UTM
16N 559318.0E 4607576.1N
Geohash
dp6su2qbx
Plus code
86HMJP96+3Q

Towns in St. Joseph County

6 incorporated places of 1,000+ people have residents in St. Joseph County, 162,976 people together, or 60% of the county. Each figure counts only the part of the town inside St. Joseph County; towns marked "part" extend into another county. The largest is South Bend with 103,713.

  1. 01South Bend103,713
  2. 02Mishawaka51,020
  3. 03Osceola2,600
  4. 04Walkerton2,098
  5. 05New Carlisle1,913
  6. 06North Liberty1,632
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering St. Joseph County

The Census 2024 county adjacency file lists 6 neighbors for St. Joseph County, including 2 across a state line. The most populous is Elkhart County, IN, with 207,436 residents. Distances run between Census internal points in a straight line.

Distance to Indianapolis and the nearest big city

Indianapolis is 127.9 miles S of St. Joseph County's internal point in a straight line. The nearest place of 100,000 or more is South Bend, IN (population 103,713), 4.2 miles away.

St. Joseph County FIPS code

The FIPS code of St. Joseph County is 18141: state code 18 for Indiana plus county code 141. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $65,977.

Questions people ask

What is the population of St. Joseph County, Indiana?

The Census Vintage 2024 estimate for July 1, 2024 is 273,744. That is up 1,056 people (0.4%) from the July 2020 estimate of 272,688.

What is the FIPS code of St. Joseph County?

18141. The first two digits (18) are Indiana; the last three (141) identify the county.

What is the largest town in St. Joseph County?

South Bend, with 103,713 residents inside St. Joseph County in 2024.

Which counties border St. Joseph County?

6 county-equivalents border it in the Census 2024 adjacency file: Elkhart County, IN; Berrien County, MI; LaPorte County, IN; Cass County, MI; Marshall County, IN; Starke 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.