| Official Name: | Fort Defiance |
| Pushpin Map: | Virginia |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location within the state of Virginia |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Type2: | County |
| Subdivision Name: | United States |
| Subdivision Name1: | Virginia |
| Subdivision Name2: | Augusta County |
| Established Date: | 1740 |
| Unit Pref: | Imperial |
| Population As Of: | 2002 |
| Population Footnotes: | [1] |
| Settlement Type: | Census-designated place |
| Population Total: | 780 |
| Timezone: | EST |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Coordinates: | 38.2403°N -78.9719°W |
| Elevation M: | 392 |
| Elevation Ft: | 1286 |
| Postal Code Type: | ZIP code |
| Postal Code: | 24437 |
| Area Code: | 540 |
Fort Defiance is an unincorporated community in Augusta County, Virginia, United States. It is part of the Staunton - Waynesboro Micropolitan Statistical Area.
Augusta Stone Church was established in the area now known as Fort Defiance in 1740. Local legend claims the church was used as a haven during the French and Indian War, when Augusta County was the western frontier for the country. The original church building was made of logs and, along with the historic cemetery, was located east of present-day U.S. Route 11 and to the rear of the stone church.[2] Following the defeat of General Edward Braddock at the Battle of the Monongahela on 9 July 1755, parishioners fortified the Old Stone Presbyterian Church and named the fortification Fort Defiance.[3] The name Fort Defiance was not put on the community until the late 19th century.[1]
Fort Defiance is served by Augusta County Public Schools. Clymore Elementary School, Stewart Middle School and Fort Defiance High School are within the unincorporated area's boundaries.