Old Rock House, National Register building in McDuffie County, Georgia.

The Old Rock House is a fortified stone garrison house in Thomson, Georgia, built about 1785 by Thomas Ansley. Its walls are of local stone, laid in the sturdy manner of a frontier stronghold rather than a plantation house. It is the oldest well-documented house in Georgia, though older ones may exist.

The fortified stone house was built around 1785 by Thomas Ansley in what is now Thomson, Georgia. It was added to the National Register of Historic Places in 1970, when it belonged to the Wrightsborough Quaker Community Foundation, Inc.; McDuffie County now owns it. It is the oldest well-documented house in Georgia, though older ones may exist.

The house is linked to the family of President Jimmy Carter, whose ancestors are said to have lived here. Since 1970 it has been owned by the Wrightsborough Quaker Community Foundation, Inc., and it is now owned by McDuffie County, which keeps it as a local heritage site.

The house stands in Thomson, McDuffie County, Georgia, at coordinates 33.48230, -82.55790, and is owned by McDuffie County. It was owned by the Wrightsborough Quaker Community Foundation, Inc., in 1970, the year it was listed on the National Register of Historic Places. Plan a visit around these ownership and location details rather than expecting a staffed site.

The house is the oldest well-documented building in Georgia, though older structures may exist. It was reportedly home to ancestors of President Jimmy Carter, and McDuffie County now owns it; the Wrightsborough Quaker Community Foundation held it in 1970.