Wheaton Warrenville South High School (WWSHS), locally referred to as "South", is a public four-year high school in Wheaton, Illinois. It is one of two high schools part of Community Unit School District 200, the other being Wheaton North High School.

The school has had a long history, during which it has had three names, and is considered the successor to a school with a similar name. The school is known for its academic and athletic accomplishments, its alumni include astronomer Edwin Hubble, comedian John Belushi and actor Jim Belushi.