Johnson Island Civil War Prison and Fort Site

A National Historic Landmark. Listed on the National Register of Historic Places in 1975. 6 historic topographic surveys show this location, the earliest from 1904.

From the record

One of 30 National Register listings published here for Ottawa County · listed in 1975 · category: Site · a National Historic Landmark.

Sources: the case file at the National Archives · the National Register database, National Park Service · the Wikipedia article

The listing

Address. E shore area of Johnson Island, Danbury
When was it listed? March 1975
Category. site
National Register reference number. 75001514 - the number the National Park Service assigned this property when it was listed, and the key its nomination file is catalogued under at the National Archives.

Mines and quarries near this property

5 within 5 miles

Regional context, not property-specific evidence. The federal mineral resources record lists 5 workings within 5 miles of Johnson Island Civil War Prison and Fort Site: 3 past producers, 1 producer, 1 plant. 2 still produce. What was taken out: Stone, Crushed/Broken, Sand and Gravel, Construction, Limestone, General. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.

Site	Commodity	Status	Recorded
Huron Pit	Sand and Gravel, Construction	Past Producer
Marblehead Stone Quarry	Limestone, General	Past Producer	Sedimentary
Erie Materials Inc.	Stone, Crushed/Broken	Producer
Geawe Quarry	Stone, Crushed/Broken	Past Producer
Marblehead Quarry	Stone, Crushed/Broken	Plant

Every working recorded in Ottawa County

Maps showing this location

6 surveys

United States Geological Survey topographic sheets whose coverage includes this point. Matched by taking the middle of the area the National Park Service maps for this listing, then testing that coordinate against the published boundary of every sheet.

1904 USGS Sandusky quadrangle1:62500 - 3 printings
1956 USGS Toledo quadrangle1:250000 - 4 printings
1959 USGS Sandusky quadrangle1:24000
1961 USGS Toledo quadrangle1:250000
1969 USGS Sandusky quadrangle1:24000 - 5 printings
1986 USGS Lorain quadrangle1:100000 - 2 printings

Listed places nearby

6 within 8 miles

Other National Register properties close enough to walk or drive between, ordered by distance from this one. Both positions come from the same geocoding pass that matched these properties to their map sheets.

Property	Distance	Listed
War Of 1812 Battle Site	1.3 miles	1972
Benajah Wolcott House	1.4 miles	1991
Marblehead Lighthouse	2.8 miles	1969
First Congregational Church	3.0 miles	2000
Alexander Clemons House	3.0 miles	1987
Lakeside Historic District	3.0 miles	1983

Sources for this property

National Archives record	The nomination case file for reference 75001514 in Record Group 79.
Wikipedia article	Community-written account of this property, licensed CC BY-SA.
Ottawa County	All 30 listed properties in this county.

Provenance

Listing record. National Park Service National Register of Historic Places, listed-properties dataset, current to 2026-05-22.
Map join. Address geocoded through the United States Census geocoder, then tested against the published boundary of every sheet in the USGS Historical Topographic Map Collection.
How this page is made. Listing fields come from federal records; map-sheet coverage is a labelled coordinate-to-boundary calculation, not a source-field claim.
Mines and quarries. USGS Mineral Resources Data System (MRDS) https://mrdata.usgs.gov/mrds/ A work of the United States government, no copyright under 17 U.S.C. 105.