The Louisville-Jefferson County, KY-IN Metropolitan Statistical Area, commonly called the Louisville metropolitan area, is the 42nd largest Metropolitan Statistical Area (MSA) in the United States. It was originally formed by the United States Census Bureau in 1950 and consisted of the Kentucky county of Jefferson and the Indiana counties of Clark and Floyd. As surrounding counties saw an increase in their population densities and the number of their residents employed within Jefferson County, they met Census criteria to be added to the MSA. Jefferson County, Kentucky (contiguous with Louisville Metro), plus twelve outlying counties — eight in Kentucky and four in Southern Indiana are now a part of this MSA. It is now the primary MSA of the Louisville-Elizabethtown-Scottsburg, KY-IN Combined Statistical Area (or Louisville CSA, which adds Hardin County, Kentucky, LaRue County, Kentucky, and Scott County, Indiana). The Louisville CSA has a July 1, 2006 Census Bureau estimated population of 1,356,798.

Because it includes counties in Indiana, the Louisville metropolitan area is regularly referred to as Kentuckiana.

Geographic Area	July 1, 2007 •	July 1, 2006 •	July 1, 2005 •	Census 2000	1990 Census	1980 Census	1970 Census	1960 Census	1950 Census
'''Louisville- Jefferson County, KY-IN MSA²	1,233,735	1,222,216	1,208,452	1,161,975	952,662	906,152	867,330	725,139	576,900
Clark County, Indiana	105,035	103,569	101,592	96,472	87,777	88,838	75,876	62,795	48,330
Floyd County, Indiana	73,064	72,570	71,997	70,823	64,404	61,169	55,622	51,397	43,955
Harrison County, Indiana	36,810	36,992	36,827	34,325	29,890	27,276¹	20,423¹	19,207¹	17,858¹
Scott County, Indiana	23,697¹	23,704¹	23,820¹	22,960	20,991¹	20,422¹	17,144¹	14,463¹	11,519¹
Washington County, Indiana	27,920	28,062	27,885	27,223	23,717¹	21,932¹	19,278¹	17,819¹	16,520¹
Bullitt County, Kentucky	73,931	72,851	68,474	61,236	47,567	43,346	26,090	15,726¹	11,349¹
Henry County, Kentucky	15,711	16,025	15,903	15,060	12,823¹	12,740¹	10,910¹	10,987¹	11,394¹
Jefferson County, Kentucky	709,264	701,500	699,827	693,604	664,937	685,004	695,055	610,947	484,615
Meade County, Kentucky	27,270	27,994	28,447	26,349	24,170¹	22,854¹	17,796¹	18,898¹	9,422¹
Nelson County, Kentucky	42,517	42,102	41,088	37,477	29,710¹	27,584¹	23,477¹	22,168¹	19,521¹
Oldham County, Kentucky	55,935	55,285	53,533	46,178	33,263	27,795	14,687	13,388¹	11,018¹
Shelby County, Kentucky	40,458	39,717	38,205	33,337	24,824	23,328¹	18,999¹	18,493¹	17,912¹
Spencer County, Kentucky	16,837	16,475	15,651	11,766	6,801¹	5,929¹	5,488¹	5,680¹	6,157¹
Trimble County, Kentucky	8,983	9,074	9,023	8,125	6,090¹	6,253¹	5,349¹	5,102¹	5,148¹

• Populations are based upon published estimates by the United States Bureau of the Census.

¹County was not a part of Louisville, KY-IN MSA at the time of this Census and the county's population is not included in MSA total.

²Named Louisville, KY-IN Standard Metropolitan Area (SMA) in 1950, Louisville, KY-IN Standard Metropolitan Statistical Area (SMSA) from 1960 to 1981, and Louisville KY-IN Metropolitan Statistical Area (MSA) from 1983 to 2003.

See also

• Geography of Louisville, Kentucky

External links

• U.S. Census Bureau State & County QuickFacts
• U.S. Census Bureau population estimates
• Metropolitan and Micropolitan Statistical Areas
• About Metropolitan and Micropolitan Statistical Areas
• Historical Metropolitan Area Definitions