Illini West High School, or IWHS, is a public four-year high school located at 600 Miller Street in Carthage, Illinois, a small city in Hancock County, Illinois, in the Midwestern United States. IWHS serves the communities of Carthage, Dallas City, La Harpe. The campus is located 25 miles west of Macomb, Illinois, and serves a mixed small city, village, and rural residential community.