Sennan (泉南郡 Sennan-gun?) is a district located in Osaka Prefecture, Japan.
As of 2009, the district has an estimated population of 70,631 and a density of 991 persons per km². The total area is 71.27 km².
At one time Peach Aviation had its head office in a location on the property of Kansai International Airport and in Tajiri, in Sennan District.
Coordinates: 34°18′50″N 135°09′04″E / 34.314°N 135.151°E