County · code 45011
Barnwell CountySouth Carolina
Barnwell County is a county in South Carolina with its seat in Barnwell. The county was founded in 1800 and named after John Barnwell.
- Founded1800
- County seatBarnwell
- Named forJohn Barnwell
- Land area548 sq mi + 8.9 sq mi water
- Population20,589 2020 Census
- Parcels mapped16,075 checked 16 October 2026
Where it is
Barnwell on the map of South Carolina
South Carolina has 46 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Founded in 1800
An old deed may name a county that no longer exists, or a boundary that has since moved.
Barnwell District became Barnwell County in 1868 when a new state constitution abolished all judicial districts. The county lost territory to the creation of Aiken County in 1871, exchanged territory with Aiken in 1874, and lost land to the creation of Bamberg County in 1897 and Allendale County in 1919.
- 1868Eliminated Barnwell District eliminated, became Barnwell County when new state constitution abolished all judicial districts. Barnwell County assumed all functions of local government from both judicial districts and parishes. · Swindler, 8:497
- 1871Lost territory Barnwell lost to creation of Aiken. · S.C. Acts 1871, no. 420, sec. 1/p. 695
- 1874Exchanged territory Barnwell exchanged with Aiken. · S.C. Acts 1874, no. 558, sec. 1/p. 649
- 1897Lost territory Barnwell lost to creation of Bamberg. · S.C. Acts 1897, no. 344, secs. 1, 18/pp. 580-581, 588
- 1919Lost territory Barnwell lost to creation of Allendale. · S.C. Acts 1919, no. 6, sec. 1/pp. 5-6
Land and parcels
What the maps cover in Barnwell
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 16,075 parcels from Barnwell County. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 13 August 2026 · checked 16 October 2026 -
Address points Missing
No public address points layer found for Barnwell County yet.
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Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- Official
- from the office that keeps the record
- Good enough
- a reliable statewide or national copy
- Fallback
- a guide only; check the official record
- Missing
- nothing public found yet
People and land
Barnwell by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
Rules and offices
Barnwell County's official site
We have found the county's site but not its offices yet; start there.
County government
- County government
The official website of Barnwell County.
See your own lot on these maps
Open Barnwell County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.
Questions
Common questions about Barnwell County
- When was Barnwell County founded?
- Barnwell County was founded in 1800, and named after John Barnwell.
- What is the county seat of Barnwell County?
- The county seat of Barnwell County is Barnwell.
- Is there an online parcel map for Barnwell County?
- Yes. Barnwell County publishes a parcel map of 16,075 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Barnwell County's boundary or name changed?
- Atlas of Historical County Boundaries records 5 changes for Barnwell County. Since then the Atlas of Historical County Boundaries records 5 later changes, chiefly involving Aiken County, Allendale County and Bamberg County.
- Is my lot in a flood zone?
- We do not have flood maps for Barnwell County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby