Sennan (泉南市, Sennan-shi) is a city located in Osaka Prefecture, Japan. The city was founded on July 1, 1970.
As of October 1, 2016, the city has an estimated population of 62,076 and a population density of 1,300 persons per km². The total area is 48.48 km².
The southern portion of Kansai International Airport is within the city boundary.