The Battle of Lexington State Historic Site is a state park, historic site, and recreation area in Lexington, Missouri. It preserves the site where the Battle of Lexington took place in 1861.

Established as a state park in 1958, the Battle of Lexington State Historic Site traces its roots back to the early days of the American Civil War. The skirmish that took place in the site was between the troops of Confederate General Sterling Price and Federal Colonel James A. Mulligan. The event ran for three days, and was very bloody, making it a noted event in history.

The Battle of Lexington State Historic Site is also where folks will find the Oliver Anderson Mansion, noted as the ?best arranged dwelling house west of St. Louis? during its heyday.