&sq=&lang=&file=File:USS_Onondaga_63173.jpg) Onondaga at anchor on the James River, c. 1864–1865
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| History | |
|---|---|
 United States | |
| Name | Onondaga |
| Namesake | A lake and county in New York |
| Ordered | 26 May 1862 |
| Builder | Continental Iron Works, Greenpoint, Brooklyn |
| Laid down | 1862 |
| Launched | 29 July 1863 |
| Sponsored by | Sally Sedgwick |
| Commissioned | 24 March 1864 |
| Decommissioned | 8 June 1865 |
| Fate | Sold to her builder, 7 March 1867, and subsequently resold to France |
 Second French Empire | |
| Name | Onondaga |
| Acquired | 7 March 1867 |
| Stricken | 2 December 1904 |
| Fate | Sold for scrap, 1904 |
| General characteristics (as built) | |
| Type | Double-turreted monitor |
| Displacement | 2,592 long tons (2,634 t) |
| Tons burthen | 1,250 tons (bm) |
| Length | 226 ft (68.9 m) (o/a) |
| Beam | 51 ft 5 in (15.7 m) |
| Draft | 12 ft (3.7 m) |
| Depth | 12 ft 10 in (3.9 m) |
| Installed power |
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| Propulsion | 2 × propellers; 2 × back-acting steam engines |
| Speed | 7 knots (13 km/h; 8.1 mph) |
| Range | 720 nmi (1,330 km; 830 mi) |
| Complement | 130 officers and enlisted men |
| Armament |
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| Armor |
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USS Onondaga was an ironclad monitor built for the Union Navy during the American Civil War. Commissioned in 1864, the ship spent her entire active career with the James River Flotilla covering the water approaches to the Confederate States capital of Richmond, Virginia, although her only notable engagement was the Battle of Trent's Reach. After the war, she was purchased by France where she served as a coastal defense ship in the French Navy (Marine Nationale).
Onondaga saw little active service with the French, spending most of the next four decades in reserve, although she was mobilized during the Franco-Prussian War of 1870–1871. The monitor became a guard ship in 1898, but she was stricken from the naval register and sold for scrap in 1904; the ship was demolished in 1905.