is the largest city in Kentucky's Jackson Purchase Region and the county seat of McCracken County, Kentucky, United States. It is located at the confluence of the Tennessee River and the Ohio River. The population was 26,307 at the 2000 census. Twenty blocks of Downtown Paducah have been placed on the National Register of Historic Places.
It is the hub for the Paducah Micropolitan Area, which includes McCracken, Ballard and Livingston counties in Kentucky and Massac County in Illinois; which had a population of 98,127 in 2006.
According to the United States Census Bureau, the city has a total area of 19.5 square miles (50.5 km²), of which, 19.5 square miles (50.5 km²) of it is land and 0.04 square miles (0.1 km²) of it (0.10%) is water.