Lake Simcoe Regional Airport (IATA: YLK, ICAO: CYLS), formerly the Oro Barrie Orillia Regional Airport, is a registered aerodrome that operates as a regional airport located near Highway 11 in the township of Oro-Medonte, Ontario, Canada. The airport is operated by Lake Simcoe Regional Airport Inc., a municipal service corporation jointly owned by the County of Simcoe (90%) and the City of Barrie (10%).