Ischua is a town in Cattaraugus County, New York, United States. As of the 2020 census, the town has a population of 734. It also has a hamlet by that name. It is located on the eastern border of the county, north of Olean. Ischua was incorporated in 1834 and was named after the Ischua River.
The population and steets of Ischua are quite diverse, with the town's racial makeup showing a diversity of racial groups. Areas with more diversity have a green color, while those with darker colors are less diverse. The area in the middle is considered to be less diverse than the surrounding area. The majority of Ischua is white and Asian.