Washington County Airport (FAA LID: 8WC) is a county-owned, public-use airport in Washington County, Missouri, United States. It is located three nautical miles (6 km) east of the central business district of Potosi, Missouri,.

Washington County Airport covers an area of 120 acres (49 ha) at an elevation of 959 feet (292 m) above mean sea level. It has one runway designated 2/20 with an asphalt surface measuring 4,000 by 60 feet (1,219 x 18 m).

For the 12-month period ending June 30, 2011, the airport had 1,040 aircraft operations, an average of 86 per month: 96% general aviation, 3% air taxi, and 1% military. At that time there were 11 aircraft based at this airport: 82% single-engine and 18% ultralight.

• List of airports in Missouri

• Washington County Airport (8WC) at Missouri DOT Airport Directory
• Aerial image as of March 1996 from USGS The National Map
• FAA Terminal Procedures for 8WC, effective October 3, 2024
• Resources for this airport:
  • FAA airport information for 8WC
  • AirNav airport information for 8WC
  • FlightAware airport information and live flight tracker
  • SkyVector aeronautical chart for 8WC