Site of the Battle of Corydon

Harrison County, Indiana, was originally inhabited by various Native American tribes, including the Shawnee and Miami. The area was first explored by Europeans in the 17th century when French fur traders ventured into the region. However, it was not until the late 18th century that European settlers arrived in significant numbers. Harrison County was officially established in 1808 and named after President William Henry Harrison, who later became the ninth President of the United States.

During the early years of its establishment, Harrison County primarily relied on agriculture, with farming being the primary occupation of its settlers. The county's fertile soil and favorable climate made it ideal for growing crops such as corn, wheat, and tobacco. As the population grew, small towns started to develop, and infrastructure improved with the construction of roads and bridges.

In the 19th century, Harrison County played a significant role in the Underground Railroad, a network of secret routes and safe houses that helped enslaved African Americans escape to freedom. The county's proximity to the Ohio River made it an important hub for the movement, and many courageous residents played key roles in assisting runaway slaves.

In the 20th century, Harrison County experienced significant growth and industrial development. The discovery of oil and natural gas reserves in the area brought economic prosperity, leading to the establishment of oil refineries and other related industries. Over the years, the county has continued to thrive and diversify its economy, while also preserving its historical heritage and natural beauty.