• county
  • FIPS 18075
  • Largest town: Portland

Jay County, Indiana

Jay County had 20,164 residents in the Census Vintage 2024 estimate, on 383.9 square miles of land. It ranks 72nd of 92 in Indiana by population and 56th by land area.

Population
20,164
#72 of 92 in Indiana · #1,818 in US
Area
383.9 sq mi
#56 of 92 in Indiana · #2,590 in US
Density
53 / sq mi
#74 of 92 in Indiana · #1,419 in US
Median household income
$61,030
#70 of 92 in Indiana · #1,738 in US

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

Jay County within Indiana. Pin: Indianapolis.

Measure from here

Tools and pages that start from Jay County

Jay County population, land area and income

Jay County had 20,164 residents in the Census Vintage 2024 estimate, on 383.9 square miles of land. It ranks 72nd of 92 in Indiana by population and 56th by land area. That works out to 52.5 people per square mile, below the US average of 96.3, and above the national county median.

The median county-equivalent in Indiana has 34,874 residents; Jay County is somewhat smaller.

Its SAIPE 2023 median household income of $61,030 is below the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

20,164

3144th1st

1818th of 3,144 (US)

Land area

384 sq mi

3144th1st

2590th of 3,144 (US)

Density

52.5 / sq mi

3144th1st

1419th of 3,144 (US)

Median household income

$61,030

3143rd1st

1738th of 3,143 (US)

Rank within Indiana (92)

Population

20,164

92nd1st

72nd of 92 (IN)

Land area

384 sq mi

92nd1st

56th of 92 (IN)

Density

52.5 / sq mi

92nd1st

74th of 92 (IN)

Median household income

$61,030

92nd1st

70th of 92 (IN)

How Jay County's population changed since 2020

Jay County lost 317 residents between the July 2020 and July 2024 estimates, a drop of 1.5%. That ranks 89th 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, Jay County recorded 1,185 births and 1,199 deaths, a natural change of -14. Net international migration added +55 and net domestic migration, people moving to or from other US counties, came to -355. The largest single component was domestic migration, which removed 355 people.

20.5k202020.3k202120.1k202220.1k202320.2k2024
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
1,185
Deaths
1,199
Net international migration
+55
Net domestic migration
-355
Change, July 2023 to July 2024
+95

Where Jay County is

The Census internal point of Jay County is at 40.435000, -85.002300. 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 Jay 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: Jay County internal point. Dark pin: Indianapolis.

Internal point

Decimal
40.435000, -85.002300
DMS
40°26'6.00"N 85°00'8.28"W
UTM
16N 669441.6E 4477956.1N
Geohash
dp5w18zny
Plus code
86GPCXPX+23

Towns in Jay County

3 incorporated places of 1,000+ people have residents in Jay County, 9,285 people together, or 46% of the county. Each figure counts only the part of the town inside Jay County; towns marked "part" extend into another county. The largest is Portland with 6,233.

  1. 01Portland6,233
  2. 02Dunkirk (part)1,977
  3. 03Redkey1,075
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Jay County

The Census 2024 county adjacency file lists 7 neighbors for Jay County, including 2 across a state line. The most populous is Delaware County, IN, with 112,951 residents. Distances run between Census internal points in a straight line.

Distance to Indianapolis and the nearest big city

Indianapolis is 76.5 miles SW of Jay County's internal point in a straight line. The nearest place of 100,000 or more is Fort Wayne, IN (population 273,203), 45.7 miles away. The nearest place of 10,000 or more is Bluffton, IN (population 10,556), 23.1 miles away.

Jay County FIPS code

The FIPS code of Jay County is 18075: state code 18 for Indiana plus county code 075. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $61,030.

Questions people ask

What is the population of Jay County, Indiana?

The Census Vintage 2024 estimate for July 1, 2024 is 20,164. That is down 317 people (1.5%) from the July 2020 estimate of 20,481.

What is the FIPS code of Jay County?

18075. The first two digits (18) are Indiana; the last three (075) identify the county.

What is the largest town in Jay County?

Portland, with 6,233 residents inside Jay County in 2024.

Which counties border Jay County?

7 county-equivalents border it in the Census 2024 adjacency file: Delaware County, IN; Darke County, OH; Mercer County, OH; Adams County, IN; Wells County, IN; Randolph County, IN; Blackford 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.