Grafton High School is the name of several high schools:
Australia Grafton High School (New South Wales), Grafton, New South Wales
United States Grafton High School (North Dakota), Grafton, North Dakota Grafton High School (Massachusetts), Grafton, Massachusetts Grafton High School (Virginia), Yorktown, Virginia Grafton High School (West Virginia), Grafton, West Virginia; a high school in Taylor County, West Virginia Grafton High School (Wisconsin), Grafton, Wisconsin