David Henry Hickman High School (commonly Hickman or HHS) is a coeducational public secondary school in Columbia, Missouri, United States, serving students in grades 9–12. The school is one of three high schools in the Columbia Public School District, with admission based primarily on the locations of students' homes. Hickman is one of the largest high schools in Missouri and has been called the largest in terms of athletic and academic competition. The school is noted for its strong academic programs. Hickman has a number notable alumni including a Missouri Governor, several U.S. and State members of congress, Frederick Chapman Robbins, who won the 1954 Nobel Prize for medicine, Sam Walton, founder of Wal-Mart, and Kenneth Lay, founder and former CEO of the now-bankrupt Enron Corporation.