LSU Campus Mounds, Archaeological site at Louisiana State University, United States.

LSU Campus Mounds are two earthen structures located on the main grounds of Louisiana State University in Baton Rouge, Louisiana. Each mound rises roughly 20 feet (6 meters) in height, forming a distinct elevation across the otherwise flat campus terrain.

Built more than 11,000 years ago by Indigenous peoples, these structures rank among the oldest human-made constructions on the American continent. Their creation predates the construction of the Egyptian pyramids by thousands of years, highlighting their extraordinary age.

Scholars agree the mounds served ceremonial and marking-point purposes rather than burial, part of a statewide mound system. In 2009 LSU professor Brooks Ellwood took core samples that revealed a charcoal layer, possibly from a pit barbecue or a cremation; he later conjectured the mounds hold cremated human remains.

A sidewalk laid between the two mounds in 1985 lets visitors walk past without climbing them, and a low brick wall rings the bases to keep vehicles off. Since 2010 the mounds are fenced off during LSU home football games, when tailgating crowds fill the surrounding campus. Stay on the paved path and the lawn edge rather than walking up the grass.

The mounds were long used for tailgate parties before LSU began fencing them off during home football games in 2010. That year the university launched the "Save the Mounds" campaign, warning that internal structural damage could eventually cause the mounds to collapse.