| Wilmington High School | |
| Type: | Comprehensive public high school |
| District: | Wilmington School District 209-U |
| Grades: | 9–12 |
| Superintendent: | Matt Swick |
| Principal: | Scott Maupin |
| Enrollment: | 465 (2016-17)[1] |
| Area: | South Suburbs |
| Campus Size: | 24acres |
| Athletics Conference: | Illinois Central Eight |
| Mascot: | Wildcats |
| Colors: | Purple and white |
| Location: | 209 Wildcat Court Wilmington, Illinois 60481 |
| Country: | US |
| Coordinates: | 41.3033°N -88.1319°W |
| Website: | https://www.209u.net/o/whs |
Wilmington High School (or WHS) is a public four-year high school located in Wilmington, a southwest suburb of Chicago of the United States, in Will County. It is operated by Wilmington School District 209-U.