Okanogan Legion Airport (FAA LID: S35) is a city-owned, public-use airport located one nautical mile (2 km) east of the central business district of Okanogan, a city in Okanogan County, Washington, United States.

Okanogan Legion Airport covers an area of 30 acres (12 ha) at an elevation of 1,042 feet (318 m) above mean sea level. It has one runway designated 4/22 with an asphalt surface measuring 2,533 by 36 feet (772 x 11 m).

For the 12-month period ending May 30, 2012, the airport had 4,100 aircraft operations, an average of 11 per day: 98% general aviation and 2% air taxi. At that time there were 14 aircraft based at this airport: 86% single-engine, 7% multi-engine, and 7% ultralight.

• List of airports in Washington

• Okanogan Legion Airport (S35) at WSDOT Airport Directory
• Aerial image as of July 1996 from USGS The National Map
• Resources for this airport:
  • FAA airport information for S35
  • AirNav airport information for S35
  • FlightAware airport information and live flight tracker
  • SkyVector aeronautical chart for S35