Assiniboia Airport (ICAO: CJN4) is a small regional aerodrome located near Assiniboia, a town in southern Saskatchewan, Canada. It serves general aviation traffic and supports the agricultural and light industrial activities of the surrounding region. The airport operates without scheduled commercial airline service and is primarily used by private pilots, charter flights, and agricultural aviation operations. It is typical of many rural Canadian aerodromes that provide essential access to communities distant from major urban centres. Assiniboia itself is situated in the southern prairies, and the airport reflects the modest aviation infrastructure common to small Prairie towns, offering a paved runway and basic facilities for transient and local aircraft.