Lake Highlands High School (LHHS) is a secondary school serving grades 9-12 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 in central Lake Highlands near the DART Blue Line. The Lake Highlands Freshman Center (which sits on the same property as LHHS) formerly housed the 9th-grade students, but has recently been integrated into the rest of the school, housing classes for all 9-12 students. The first graduating class of Lake Highlands High School was in 1964.