The Battle of Plymouth was an engagement during the American Civil War that was fought from April 17 through April 20, 1864, in Washington County, North Carolina.

During the American Civil War, North Carolina joined the Confederacy with some reluctance, mainly due to the presence of Unionist sentiment within the state. A popular vote in February, 1861 on the issue of secession was won by the unionists but not by a wide margin. This slight lean in favor of staying in the Union would shift towards the Confederacy in response to Abraham Lincoln's April 15 proclamation that requested 75,000 troops from all Union states, leading to North Carolina's secession. Similar to Arkansas, Tennessee, and Virginia, North Carolina wished to remain uninvolved in the likely war but felt forced to pick a side by the proclamation. Throughout the war, North Carolina widely remained a divided state. The population within the Appalachian Mountains in the western part of the state contained large pockets of Unionism. Even so, North Carolina would help contribute a significant amount of troops to the Confederacy, and channel many vital supplies through the major port of Wilmington, in defiance of the Union blockade.