Lake Highlands High School (LHHS) is a secondary school serving grades 9-12 located in the Lake Highlands area of northeastern Dallas, Texas, United States, primarily serving the Lake Highlands community. The school is part of the Richardson Independent School District and is located centrally within Lake Highlands near the DART Blue Line. The Lake Highlands Freshman Center houses the 9th grade students. The first graduating class of Lake Highlands High School was in 1964.