Buchanan County was named for the United States president James Buchanan and was formed from Tazewell and Russell Counties in 1858. Its area is 508 square miles, and the county seat is Grundy. The population is 26,978 according to the 2000 census.

Note: Buchanan is one of the Commonwealth's Burned Records Counties. Its county court records were destroyed by fire in 1885; records created after that date suffered extreme damage in a flood in 1977. A few re-recorded deeds exist.

Original Records at The Library of Virginia: Yes