Olustee Battlefield Historic State Park, Civil War battlefield in Baker County, Florida.

Olustee Battlefield Historic State Park lies on U.S. 90 in the Osceola National Forest, 50 miles west of Jacksonville. Florida owns 3.09 acres and manages 688 acres of the battlefield under a U.S. Forest Service permit. A low sign on a stacked-stone base shows two soldiers, a cannon and the painted words "Olustee Battlefield".

The Battle of Olustee in February 1864 was one of the war's largest engagements in Florida, involving roughly 10,000 soldiers. The fighting ended with Union forces withdrawing to Jacksonville.

The 54th Massachusetts Infantry, including the 54th Massachusetts Volunteer Infantry, fought here on 20 February 1864; the 54th's Colonel Edward N. Hallowell was wounded. The 35th United States Colored Troops also took part. The Olustee Battlefield Monument, dedicated on 23 October 1912, commemorates the battle.

The park sits west of Jacksonville along U.S. Route 90 and is accessible by several walking trails throughout the grounds. An interpretive center provides information about the battle and the site.

Most of the battlefield is not state-owned but managed through a partnership with the U.S. Forest Service. This arrangement has allowed the site to remain protected and accessible for visitors.