Old Fort Harrod State Park is a park located in Harrodsburg, Kentucky in the United States. The park encompasses 15 acres (6.1 ha) and features a reconstruction of Fort Harrod, the first permanent American settlement in the state of Kentucky. The fort was named after James Harrod, who led an early party of settlers into Kentucky.

The park was founded in November 1934 as Pioneer Memorial State Park, and dedicated by President Franklin D. Roosevelt and Governor Ruby Laffoon.

The park features several attractions: the replica of the old fort, the Mansion Museum, the George Rogers Clark Federal Monument, Lincoln Marriage Temple, and oldest cemetery west of the Alleghenies.

The reconstructed fort contains several log structures representing various aspects of military frontier life, including a militia blockhouse, a family blockhouse, several cabins demonstrating pioneer life, a blab school, the minister's cabin, and the leader's cabin. (The actual site of the original fort is under the current parking lot.)^{[citation needed]}

The Mansion Museum is a Greek Revival home that contains American Civil War artifacts, a McIntosh gun collection, paintings, documents, music collections, Abraham Lincoln memorabilia and Native American artifacts.

The Lincoln Marriage Temple is a brick structure, housing the reconstructed log cabin where Abraham Lincoln's parents, Thomas Lincoln and Nancy Hanks, were married.

The George Rogers Clark Federal Monument (not to be confused with the George Rogers Clark National Historical Park in Vincennes, Indiana) was designed by architect Francis Keally and sculptor Ulric Ellerhusen.

The park also has the so-called 'Big Ole Tree', the largest Osage Orange tree in the US.