History
Louisa County was established in 1742 from Hanover County which had been created in 1720 from New Kent County (St. Paul's Parish).
Source: "Louisa County, Virginia", http://en.wikipedia.org/wiki/Louisa_County,_Virginia.
Modern Day Adjacent Counties
Orange County
Spotsylvania County
Hanover County
Goochland County
Fluvanna County
Albemarle County