Fort Delaware

Background

Fort Delaware is a former harbor defense facility, designed by chief engineer Joseph Gilbert Totten and located on Pea Patch Island in the Delaware River. During the American Civil War (1861–1865), the Union / United States Department of War / United States Army used Fort Delaware as a prison for Confederate prisoners of war, political prisoners, miscellaneous civilians, federal convicts, and privateer officers. A three-gun concrete battery of 12-inch guns, later named Battery Torbert, was designed by Maj. Charles W. Raymond and built inside the fort in the 1890s. By 1900, the fort was part of a three fort concept, the first forts of the Coast Defenses of the Delaware, working closely with Fort Mott further upstream on the opposite shore, in Pennsville, New Jersey, and Fort DuPont downstream in Delaware City, Delaware.

Source: Wikipedia article lead, CC-BY-SA.

Same country, matched on type + security level where possible.

• Rikers Island
  East Elmhurst, NYMixedLocal jail42% occupancy
• Franklin County Detention Facility
  St. AlbansMaximumCounty jail660% occupancy
• Gallia County Jail
  GallipolisCounty jail336% occupancy
• Southwest Virginia Regional Jail - Tazewell
  TazewellMaximumCounty jail330% occupancy
• Noble County Jail
  CaldwellCounty jail542% occupancy
• Stark County Jail
  ToulonCounty jail3446% occupancy

Under CC-BY-4.0. Include the URL and access date; the site is a living reference and entries can change.

World Prisons. (2026). Fort Delaware. Retrieved July 21, 2026, from https://worldprisons.com/prisons/fort-delaware

"Fort Delaware." World Prisons. Accessed July 21, 2026. https://worldprisons.com/prisons/fort-delaware.

@misc{worldprisons-fort-delaware,
  author = {{World Prisons}},
  title = {Fort Delaware},
  year = {2026},
  url = {https://worldprisons.com/prisons/fort-delaware},
  urldate = {2026-07-21}
}