Ron Johnson wrote:2000 was most recent census: Louisville, KY Population (year 2000): 256,231
You think it's all right for a major newspaper to use eight-year-old data in a story? Yes, the decennial census was in 2000, but the U.S. Census Bureau itself makes annual estimates readily available. It took me about 90 seconds to find the spreadsheet with Louisville's July 1, 2006 population: 554496 (excluding all the mini-cities).
Here's the download page:
U.S. Census Bureau, cities & towns, Places over 100,000: 2000 to 2006Thanks to the exclusion of the small cities, by the way, we rank not as 16th but a mere 27th, between Denver and Las Vegas.