Fort Johnson Site (James Island)
Charleston, South Carolina, USA
Site of Fort Johnson plaque, surviving powder magazine near northeastern end of Fort Johnson Road, James Island, Charleston, SC 29412, USA
MARKER
VISITOR INFORMATION
The address is the Marine Resources Center, not a confirmed unrestricted historic-site entrance. Ask SCDNR about access to the powder magazine; do not apply administrative gate hours as public touring hours. Map point reviewed October 3, 2026: Visitor reference is the photographed DAR Site of Fort Johnson plaque associated with the surviving powder magazine near the road’s northeastern end. It records Moultrie’s 1776 flag raising. This is the documented plaque point, replacing the unsuitable generic visitor-page pin reviewed earlier. Contact SCDNR about current access. Visitor information reviewed October 3, 2026: The plaque is associated with a surviving powder magazine built around 1820–1830. SCDNR also documents tabby-wall remnants from the earlier fort. Contact the Marine Resources Center about permitted historic-site access. Research-campus parking and toilets are not assumed to be public visitor facilities.
Visitor amenities reviewed October 3, 2026: No confirmed information was found for visitor parking and public restrooms. The NO entries reflect unverified provision, rather than confirmed absence. Check locally before relying on facilities.
The fort remains are within the SCDNR marine-research campus. Contact the operator before entering; routine public tours, admission and an unrestricted visitor schedule were not confirmed.
Peak visitation season unconfirmed. No reliable site-specific monthly attendance pattern was established.
March-April or October-November for a specifically permitted heritage visit beyond summer heat. Confirm public access with the Fort Johnson research campus before choosing dates.
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WHO WAS HERE
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PEOPLE WHO LIVED HERE
About Fort Johnson Site (James Island)
Fort Johnson on James Island guarded the approaches to Charleston through several successive fortifications. Patriot troops took the position in September 1775, and it remained in their hands until 1780. A surviving eighteenth-century powder magazine and later interpretation connect the modern grounds with the harbor’s military past.
Fort Johnson retains a brick powder magazine and traces of later military works on land used by South Carolina's marine research program. State inventories disagree on the magazine's date: SCDAH gives 1765, while SCDNR gives 1820-30. Marshlands House was moved here in 1961 and is separate from the fort's original buildings.
History happened here at Fort Johnson Site (James Island)
Fort Johnson’s history predates the American Revolution. Its strategic position at Charleston Harbor led to repeated rebuilding as military needs and coastal conditions changed. In September 1775, South Carolina troops under William Motté took the fort, placing an established coastal defense under the control of the revolutionary government.
The position remained in Patriot hands until British forces advancing on Charleston found it abandoned in 1780. A period siege map shows the fort destroyed, though the cause is uncertain. The site later played another military role during the Civil War, making it essential to distinguish the Revolutionary magazine from later defenses.
PEOPLE WHO DIED HERE
PEOPLE AT REST HERE
EXTERNAL LINKS
Research reviewed October 2, 2026. Event ID 7b3b6821-5943-441b-9f1a-c159af21c358; Events Latest 10PM.csv row 284.
https://www.dnr.sc.gov/marine/mrri/ftjohnson.html
https://www.nationalregister.sc.gov/charleston/S10817710047/index.htm
https://www.dnr.sc.gov/admin/phone.html
Map location reviewed October 3, 2026. Visitor reference is the photographed DAR Site of Fort Johnson plaque associated with the surviving powder magazine near the road’s northeastern end. It records Moultrie’s 1776 flag raising. This is the documented plaque point, replacing the unsuitable generic visitor-page pin reviewed earlier. Contact SCDNR about current access.
https://www.hmdb.org/m.asp?m=241938
Visitor classification and amenities reviewed October 3, 2026. Destination: Fort Johnson plaque at the surviving powder magazine, James Island.
Prose batch 3 researched October 3, 2026. Fast pass; proofing pending. Separate successive forts, eighteenth-century magazine, Civil War batteries and relocated Marshlands House. Fresh SCDNR history read; register details require proof.
Visitor admission and access fields reviewed October 3, 2026. Destination: Fort Johnson plaque at the surviving powder magazine, James Island.