Louisville is the largest city

City

A city is a relatively large and permanent settlement. Although there is no agreement on how a city is distinguished from a town within general English language meanings, many cities have a particular administrative, legal, or historical status based on local law.For example, in the U.S...

 in the U.S. state

U.S. state

A U.S. state is any one of the 50 federated states of the United States of America that share sovereignty with the federal government. Because of this shared sovereignty, an American is a citizen both of the federal entity and of his or her state of domicile. Four states use the official title of...

 of Kentucky

Kentucky

The Commonwealth of Kentucky is a state located in the East Central United States of America. As classified by the United States Census Bureau, Kentucky is a Southern state, more specifically in the East South Central region. Kentucky is one of four U.S. states constituted as a commonwealth...

, and the county seat of Jefferson County

Jefferson County, Kentucky

As of the census of 2000, there were 693,604 people, 287,012 households, and 183,113 families residing in the county. The population density was . There were 305,835 housing units at an average density of...

. Since 2003, the city's borders have been coterminous with those of the county because of a city-county merger

Consolidated city-county

In United States local government, a consolidated city–county is a city and county that have been merged into one unified jurisdiction. As such it is simultaneously a city, which is a municipal corporation, and a county, which is an administrative division of a state...

. The city's population at the 2010 census was 741,096 (consolidated; balance total is 597,337). An important internal shipping port in the 19th century, Louisville today is best known as the location of the Kentucky Derby

Kentucky Derby

The Kentucky Derby is a Grade I stakes race for three-year-old Thoroughbred horses, held annually in Louisville, Kentucky, United States on the first Saturday in May, capping the two-week-long Kentucky Derby Festival. The race is one and a quarter mile at Churchill Downs. Colts and geldings carry...

, the first of three annual thoroughbred horse races making up the Triple Crown

Triple Crown of Thoroughbred Racing

The Triple Crown of Thoroughbred Racing consists of three races for three-year-old Thoroughbred horses. Winning all three of these Thoroughbred horse races is considered the greatest accomplishment of a Thoroughbred racehorse...

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Louisville is situated on the Ohio River

Ohio River

The Ohio River is the largest tributary, by volume, of the Mississippi River. At the confluence, the Ohio is even bigger than the Mississippi and, thus, is hydrologically the main stream of the whole river system, including the Allegheny River further upstream...

 in north-central Kentucky at the Falls of the Ohio

Falls of the Ohio National Wildlife Conservation Area

The Falls of the Ohio National Wildlife Conservation Area is a national, bi-state area on the Ohio River near Louisville, Kentucky in the United States, administered by the U.S. Army Corps of Engineers. Federal status was awarded in 1981.- Overview :...

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