| Fort Davidson Battle of Pilot Knob State Historic Site | |
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| Location | Pilot Knob, Iron County, Missouri, United States |
| Coordinates | 37°37′11″N 90°38′24″W / 37.61972°N 90.64000°W |
| Area | 77.4 acres (31.3 ha) |
| Established | 1968 |
| Visitors | 139,425 (in 2019) |
| Website | Battle of Pilot Knob State Historic Site |
Fort Davidson | |
 Fort Davidson earthworks and moat | |
| Location | Pilot Knob, Missouri |
| Area | 9.9 acres (4.0 ha) |
| Built | 1863 |
| Architect | John Wynn Davidson |
| NRHP reference No. | 70000332 |
| Added to NRHP | February 26, 1970 |
Fort Davidson, a fortification near the town of Pilot Knob, Missouri, was the site of the Battle of Fort Davidson during the American Civil War. Built by Union Army soldiers during the American Civil War, the fort repulsed Confederate attacks during the Battle of Fort Davidson on September 27, 1864, during Price's Raid. That night, the Union garrison blew up the fort's magazine and abandoned the site. A mass grave was constructed on the site to bury battlefield dead. After the war, the area was used by a mining company, before passing into private hands and eventually the administration of the United States Forest Service. In 1968, the Battle of Pilot Knob State Historic Site was created as a Missouri State Park. The fort itself was added to the National Register of Historic Places in 1970. As of 2020, a visitors center containing a museum is located within the park. The museum contains a fiber optic display, as well as artifacts including Brigadier General Thomas Ewing Jr.'s sword. The fort's walls are still visible, as is the crater created when the magazine was detonated. A monument marks the location of the mass grave.