Winston Churchill High School, often referred to as WCHS, Churchill High School, CHS or Churchill, is a public high school in Potomac, Maryland, United States, an unincorporated section of Montgomery County. It is the only public high school in Potomac.

The school is named after Winston Churchill, a British statesman and politician who was Prime Minister of the United Kingdom during World War II. Founded in 1964 as Potomac High School, the school's name was changed to "Winston Churchill High School" a year later.

Churchill belongs to the Montgomery County Public Schools system. Most of its students live in Potomac with a small portion in Bethesda.