Jay County, Indiana
Jay County: county in Indiana, United States of America
About
Jay County is a county located in the U.S. state of Indiana. As of the 2010 census, the population was 21,253 and a population density of 21 people per km². After 10 years in 2020 county had an estimated population of 20,416 inhabitants. Its county seat is Portland. The county was created 190 years ago in 1835.
County Snapshot
Jay County at a glance
Jay County currently has 5 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.
Mapped populated places
5
These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.
Indiana counties
92
Open related pagesLargest city
PortlandPopulation 5,992
Top linked places
Quick Facts about Jay County
| Population | 20,416 (2020) |
| Country | United States of America |
| State | Indiana (United States) |
| Area | 994 km2 |
| Water as percent of area | 0.05% |
| Land as percent of area | 99.95% |
| Latitude & Longitude | 40.4379,-85.0056 |
| Named for | John Jay |
| Altitude | 909 feet / 277 meters |
| Capital | Portland |
| Establishment | January 01, 1836 |
| Time Zone | Eastern Time Zone |
| Local time | 05:17:15 (17th April 2026) |
| Density | 21 Pop. per km² as of 2020 |
| Population growth | -4.1% (2010-2020) |
Geography
Jay County is located at 40°26'17"N 85°0'20"W (40.4379200, -85.0056400). It has 7 neighbors: Adams County, Blackford County, Delaware County, Randolph County, Wells County, Darke County and Mercer County.
Jay County map
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The largest city of Jay County is Portland with a population of 5,992. Other cities include, Greene population 3,260, Redkey population 1,278 and Salamonia population 158. See all Jay County cities & populated places.
Jay County Populated Places
Cities, towns, neighborhoods & other populated places in Jay County.
| City Name | Population | Title |
|---|---|---|
| Portland | 5,992 | City in and the county seat of Jay County, Indiana, United States of America |
| Greene | 3,260 | Unincorporated community in Jay County, Indiana |
| Redkey | 1,278 | City in Jay County, Indiana, United States of America |
| Bryant | 247 | Town in Bearcreek Township, Jay County, Indiana, United States |
| Salamonia | 158 | Human settlement in Jay County, Indiana, United States of America |
Official website of Jay County
Official WebsiteDemographics
According to census records, the population of Jay County decreased by 4.1% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 21,253 | - | census |
| 2011 | 21,335 | 0.38% | estimation process |
| 2012 | 21,348 | 0.06% | estimation process |
| 2013 | 21,270 | -0.37% | estimation process |
| 2014 | 21,139 | -0.62% | estimation process |
| 2015 | 21,137 | -0.01% | estimation process |
| 2016 | 21,017 | -0.57% | estimation process |
| 2017 | 20,883 | -0.64% | estimation process |
| 2018 | 20,727 | -0.75% | estimation process |
| 2019 | 20,436 | -1.42% | estimation process |
| 2020 | 20,416 | -0.1% | estimation process |
People born in Jay County (2)
People born in Jay County, including Union Army soldier John J. Williams, psychologist Calvin Perry Stone, .
More notable people
Indiana Other Counties (more counties)
| County Name | Population | Title |
|---|---|---|
| Marion County | 966,183 | County in Oregon, United States |
| Indianapolis | 877,903 | The sixteenth most populous city in the United States and the center of the Indianapolis metropolitan area. |
| Lake County | 487,536 | County in Indiana, United States |
| Allen County | 382,187 | County in Indiana, United States |
| Hamilton County | 344,238 | County in Indiana, United States |
| Fort Wayne | 272,398 | The second most populous city in Indiana and the center of the Fort Wayne metropolitan area. |
| Saint Joseph County | 271,484 | County in Indiana, United States |
| Elkhart County | 206,161 | County in Indiana, United States |
| Tippecanoe County | 196,115 | County in the northwest quadrant of Indiana, United States |
| Vanderburgh County | 182,447 | County in Indiana, United States |
| Hendricks County | 173,251 | County in Indiana, United States |
| Porter County | 170,980 | County in Indiana, United States |
| Johnson County | 160,607 | County in Indiana, United States |
| Monroe County | 148,219 | County in Indiana, United States |
| Madison County | 129,681 | County in Indiana, United States |
| Clark County | 119,266 | County in Indiana, United States |