Jefferson County, Kentucky

administration
Jefferson County Courthouse in Louisville, listed on NRHP No. 72000537
US state :	Kentucky
Administrative headquarters :	Louisville
Address of the administrative headquarters:	Metro Hall 527 West Jefferson Street Louisville, KY 40202-2814
Foundation :	May 1, 1780
Made up from:	Original County
Area code :	001 502
Demographics
Residents :	741.096 (2010)
Population density :	743.3 inhabitants / km ²
geography
Total area :	1032 km²
Water surface :	35 km²
map

Website : www.loukymetro.org

Jefferson County is a county in the state of Kentucky in the United States . The administrative seat ( county seat ) is Louisville , which after King Louis XVI. was named by France .

geography

The county is in north-central Kentucky and borders the state of Indiana in the northwest, separated by the Ohio River . Of its total area of 1032 square kilometers, 35 square kilometers are water. In Kentucky, it is bordered clockwise by the following counties: Oldham County , Shelby County , Spencer County , Bullitt County, and Hardin Counties .

history

Jefferson County was formed on May 1, 1780 as the original county from the Virginia Territory. It was named after President Thomas Jefferson .

Eight structures in Jefferson County have National Historic Landmark status . A total of 486 buildings and sites in the county are listed on the National Register of Historic Places (as of October 5, 2017).

Demographic data

growth of population
Census	Residents	± in%
1790	4765	-
1800	8754	83.7%
1810	13,399	53.1%
1820	20,768	55%
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	693604	4.3%
2010	741.096	6.8%
Before 1900 1900–1990 2000 + 2010 Jefferson County's age pyramid (as of 2000)

Smyser Memorial , listed in the NRHP

Gene Snyder US Courthouse and Custom House , listed on the NRHP

According to the 2000 census , Jefferson County had 693,604 people in 287,012 households and 183,113 families. The population density was 695 inhabitants per square kilometer. The racial the population was composed of 77.38 percent white, 18.88 percent African American, 0.22 percent Native American, 1.39 percent Asian, 0.04 percent of residents from the Pacific island area and 0.68 percent from other ethnic groups Groups; 1.42 percent were descended from two or more races. Hispanic or Latino of any race was 1.78 percent of the population.

Of the 287,012 households, 29.6 percent had children and adolescents under the age of 18 living with them. 45.2 percent were married couples living together, 14.7 percent were single mothers, 36.2 percent were non-families, 30.5 percent were single households and 10.3 percent had people aged 65 years or over. The average household size was 2.37 and the average family size was 2.97 people.

For the entire county, the population was composed of 24.3 percent of residents under the age of 18, 8.9 percent between 18 and 24 years of age, 30.4 percent between 25 and 44 years of age, and 22.8 percent between 45 and 64 years of age 13.5 percent were 65 years of age or over. The median age was 37 years. For every 100 females there were 91.6 males. For every 100 women 18 years of age or older there were statistically 87.6 men.

The median income for a household in the county is $ 39,457 , and the median income for a family is $ 49,161. Males had a median income of $ 36,484 versus $ 26,255 for females. The per capita income was $ 22,352. 9.5 percent of families and 12.4 percent of the population were below the poverty line. Of these, 18.1 percent were children or adolescents under 18 years of age and 8.8 percent were people over 65 years of age.