St. Thomas Municipal Airport (IATA: YQS, ICAO: CYQS) located 3.5 nautical miles (6.5 km; 4.0 mi) east of St. Thomas, Ontario, Canada is a small airport serving the general aviation needs of the area.

The base was operated by the Department of National Defence until the late 1940s as a relief field for No.

CBSA officers at this airport can handle general aviation aircraft only, with no more than 15 passengers.

The airport is in uncontrolled airspace but has a UNICOM operating during working hours on 122.70 MHz.

There are two flight training schools operating out of the airport, one for fixed wing and one for helicopter.