Locust Grove is an unincorporated community in eastern Orange County, Virginia, United States. Its ZIP code is 22508, the population of the ZIP Code Tabulation Area was 7,605 at the time of the 2000 census and increased by 60% to 12,696 by the 2010 census, making it the largest population center within the county. While Locust Grove has historically been centered on the intersection of State Routes 20 and 611, most of the current population and commercial activity is located along the State Route 3 corridor, several miles to the east. It is named after the Black Locust trees common to the area. History Established by Lieutenant Governor Alexander Spotswood in 1714 as a German settlement, the area was considered the westernmost frontier (the wilderness) of Virginia. Spotswood built a home on a portion of the Rapidan River he referred to as Porto Bella (Lovely Harbor). The home was later nicknamed in 1732 by the founder of the city of Richmond, William Byrd II, as Spotwood's "Enchanted Castle". Spotswood died in 1740 and shortly thereafter residents of the area burned the original structure to salvage building materials for their own homes. During the American Civil War the Rapidan River served as a portion of the front line between the Confederacy and the Union. The Old Plank Road connected Fredericksburg with Culpeper and crossed the Rapidan River at a location referred to as Germanna Ford. This ford was used extensively by the Union leading up to the battles of Chancellorsville, Mine Run, the Wilderness, and Spotsylvania Court House. The Battle of the Wilderness occurred from May 5 to May 7, 1864 in portions of current-day Locust Grove. Union Army Commander Ulysses S. Grant's headquarters were located 5 miles southeast of Germanna Ford on a hill near the modern-day intersections of Route 3 and Route 20. Geography There are five distinct hamlets comprising the town of Locust Grove. Germanna: Outlined by the Rapidan River the area is bordered by Flat Run and Culpeper County. This area includes Germanna Ford, the Germanna Visitor Center, the remains of Spotswood's Enchanted Castle, and the Locust Grove campus of the Germanna Community College. It is accessible along the Route 3 corridor between the river and Flat Run Road (Route 601). The Wilderness: Is home of Ellwood Manor, the burial place of General Thomas "Stonewall" Jackson's left arm, the remains of the Wilderness tavern, and the Wilderness