Time Zone: Jefferson County lies in the Eastern Time Zone (EST/EDT) and observes daylight saving time.
The community of Louisville is the Seat for Jefferson County.
Jefferson County is one of the original counties of Kentucky and was founded in 1780.
From the Census Estimates for 2009, <1> Jefferson had a population of 721,594 people. This is an increase of 4.04% since the last Census (which gave a population of 693,604 people in 2000).
At the time of the 2000 Census, Jefferson represented 17.16% of the total population of Kentucky, making it the state's most populous county (out of 120 counties).
The following table shows the recent changes in population. Other than 2000, the population counts have been estimated by the Census Bureau.
Year | Population | Change Since 2000 | Year-to-Year Change |
2010 | 741,096 | +6.85% | +2.7% since 2009 |
2009 | 721,594 | +4.04% | +0.58% since 2008 |
2008 | 717,414 | +3.43% | +0.79% since 2007 |
2007 | 711,766 | +2.62% | |
--- | | | 2000 | 693,604 | The Last Census |
More information can be found on the Jefferson County Census Page for Jefferson County. .
Below are some of the communities located in Jefferson County (for more communities, please visit our Nearby Page for Jefferson County):
Community | 2009 Population | 2000 Population | Change (2009vs. 2000) |
Jeffersontown | 26,442 | 26,633 | 0.72% decrease |
Saint Matthews | 18,750 | 15,852 | 18.28% increase |
Shively | 16,458 | 15,157 | 8.58% increase |
Lyndon | 11,213 | 9,369 | 19.68% increase |
Middletown | 7,172 | 5,744 | 24.86% increase |
Websites for Jefferson County
If you know of a history or genealogy society whose interest includes Jefferson County, would you please send us the URL for their website? We would like to add their link to our Gazetteer. To contact us, please visit our Feedback Page.
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