This article is based on the corresponding article in another wiki. For Familypedia purposes, it requires significantly more historical detail on phases of this location's development. The ideal article for a place will give the reader a feel for what it was like to live at that location at the time their relatives were alive there. Also desirable are links to organizations that may be repositories of genealogical information..
Please help to improve this page yourself if you can.

Jefferson County, Kentucky
Jefferson County KY Courthouse 2
Seal of Jefferson County, Kentucky
Map of Kentucky highlighting Jefferson County
Location in the state of Kentucky
Map of USA KY
Kentucky's location in the U.S.
Founded 1780
Named for Thomas Jefferson, President of the United States (1801–1809)
Seat Louisville
 - Total
 - Land
 - Water

398.58 sq mi (1,032 km²)
385.09 sq mi (997 km²)
13.49 sq mi (35 km²), 3.38%
 - (2010)
 - Density

1,871/sq mi (722/km²)
Time zone Eastern: UTC-5/-4

Jefferson County is a county located in the U.S. state of Kentucky. It is the most populous county in Kentucky and is more than twice as populous as the second most populous, Fayette. It was formed in 1780. The population was 741,096 in the 2010 Census.

Jefferson County is the most populous county in the Louisville/Jefferson County, KY–IN Metropolitan Statistical Area.


Jefferson county marker

Historic marker at the Jefferson County Courthouse

Jefferson County was organized in 1780 and one of the first three counties formed out of the original Kentucky County, which was still part of Virginia at the time (the other two being Fayette and Lincoln). The county is named for Thomas Jefferson, who was governor of Virginia at the time.

The last major American Indian raid in present day Jefferson County was the Chenoweth Massacre on July 17, 1789.

In 2003, its government merged with that of its largest city and county seat, Louisville, forming a new entity, the Louisville-Jefferson County Metro Government (the official long form) or simply Louisville Metro (the official short form).

Prior to this merger, the head of local government was the County Judge/Executive, a post that still exists but now has few powers. The current incumbent is Ken Herndon. Local government is effectively now led by the Mayor of Louisville Metro, Greg Fischer.


According to the 2000 census, the county has a total area of 398.58 square miles (1,032.3 km2), of which 385.09 square miles (997.4 km2) (or 96.62%) is land and 13.49 square miles (34.9 km2) (or 3.38%) is water.[1] The Ohio River forms its northern boundary with the state of Indiana.

The highest point is South Park Hill, elevation 902 feet (275 m), located in the southern part of the county. The lowest point is 383 feet (117 m) along the Ohio River just north of West Point, Kentucky.

Adjacent countiesEdit


Historical populations
Census Pop.
1790 4,765
1800 8,754 83.7%
1810 13,399 53.1%
1820 20,768 55.0%
1830 23,979 15.5%
1840 36,346 51.6%
1850 59,831 64.6%
1860 89,404 49.4%
1870 118,953 33.1%
1880 146,010 22.7%
1890 188,598 29.2%
1900 232,549 23.3%
1910 262,920 13.1%
1920 286,369 8.9%
1930 355,350 24.1%
1940 385,392 8.5%
1950 484,615 25.7%
1960 610,947 26.1%
1970 695,055 13.8%
1980 685,004 −1.4%
1990 664,937 −2.9%
2000 693,604 4.3%
2010 741,096 6.8%

As of the census[2] of 2000, there were 693,604 people, 287,012 households, and 183,113 families residing in the county. The population density was 1,801 per square mile (695 /km2). There were 305,835 housing units at an average density of 794 per square mile (307 /km2). The racial makeup of the county was 77.38% White, 18.88% Black or African American, 0.22% Native American, 1.39% Asian, 0.04% Pacific Islander, 0.68% from other races, and 1.42% from two or more races. 1.78% of the population were Hispanic or Latino of any race.

There were 287,012 households out of which 29.60% had children under the age of 18 living with them, 45.20% were married couples living together, 14.70% had a female householder with no husband present, and 36.20% were non-families. 30.50% of all households were made up of individuals and 10.30% had someone living alone who was 65 years of age or older. The average household size was 2.37 and the average family size was 2.97.

In the county the population was spread out with 24.30% under the age of 18, 8.90% from 18 to 24, 30.40% from 25 to 44, 22.80% from 45 to 64, and 13.50% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 91.60 males. For every 100 females age 18 and over, there were 87.60 males.

The median income for a household in the county was $43,789 (2005), and the median income for a family was $49,161. Males had a median income of $36,484 versus $26,255 for females. The per capita income for the county was $22,352. About 9.50% of families and 12.40% of the population were below the poverty line, including 18.10% of those under age 18 and 8.80% of those age 65 or over.

Cities, towns and census-designated placesEdit

Jefferson County KY places
NOTE: Since the formation of Louisville Metro on January 6, 2003, residents of the cities below also became citizens of the newly expanded Metro, but none of the incorporated places have dissolved in the process. The functions formerly served by the county government for the town were assumed by Louisville Metro. However, the former City of Louisville was effectively absorbed into the new city-county government.
† formerly a Census-designated Place in the county, however, in 2003, these places became neighborhoods within the city limits of Louisville Metro.

See alsoEdit


External linksEdit

Coordinates: 38°11′N 85°40′W / 38.19, -85.66

This page uses content from the English language Wikipedia. The original content was at Jefferson County, Kentucky. The list of authors can be seen in the page history. As with this Familypedia wiki, the content of Wikipedia is available under the Creative Commons License.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.