Winston Churchill High School (most commonly known as Churchill; also Winston or WCHS) is one of three public secondary schools in Lethbridge, Alberta, Canada, serving grades nine, ten, eleven, and twelve.

Entry is loosely based on location in north Lethbridge.

The school is in the Winston Churchill neighborhood.

The school offers several specialty programs, including the internationally recognized International Baccalaureate program.

Courses offered include Social Studies, Mathematics, French, Spanish, Biology, Chemistry, and Music.