Tajiri, Osaka

 is a town located in Sen'nan District, Osaka Prefecture, Japan.
As of October 2016, the town has an estimated population of 8,377 and a density of 1,700 persons per km². The total area is 4.96 km².
It is the second smallest town in Osaka Prefecture. The central portion of Kansai International Airport is located in the town boundary.
At one time Peach Aviation had its headquarters in a location that was on the airport property and in the town.