The district includes numerous historical structures, most notably the Old Capitol (Indiana's first state capitol building), the Old Treasury Building (Indiana's first state office building), Governor Hendricks' Headquarters, the Constitution Elm Memorial, the Posey House, the Kintner-McGrain House (Cedar Glade), and The Kintner House Inn, as well as other residential and commercial sites.

The town's historic district includes a portion of the tree's preserved trunk, surrounded by a sandstone memorial.

[11][12] A historical marker erected on the Harrison County Courthouse lawn denotes the town's surrender to Confederate Brigadier General John Hunt Morgan's raiders following the Battle of Corydon on July 9, 1863.

[16][17] Because of its history as a territorial and state capital, Corydon sees an estimated 30,000 visitors each year.

The building was nearly completed in 1816, the year that Indiana was granted statehood and its first state legislature convened at Corydon.

[6] Dennis Pennington, who became the state's first speaker of the Indiana Senate after statehood in 1816, supervised its construction.

The lower level has 15-foot (4.6 m) ceilings, flagstone floors, and a barn rail made from hewn timber.

The original building had a scale and balance on the roof as the symbol of justice, but they were removed in 1833 and replaced with a large bell.

Two large chimneys that accommodated the four fireplaces installed in both the upper and lower levels were closed up during later renovations.

The building has been restored as closely as possible to its original appearance, including furniture and paint colors.

[11][21] In 2015, a major restoration project was completed on the town square to protect the Old Capitol building from water damage, to update the electrical system and landscaping, and to install new walkways.

[11] The Indiana State Museum and Historic Sites Corporation began a major rehabilitation of this building in 2008.

[citation needed] Governor Hendricks's Headquarters is also part of the Corydon Capitol State Historic Site.

After Floyd lost the home during the financial Panic of 1819, the state government purchased it to house the Indiana's governor.

[11] Allan D. Thom and Thomas Lloyd Posey were the original owners of the home when its construction began in 1817.

[14] The property passed through several owners until the Daughters of the American Revolution acquired it in 1925[25] and operated it as a local history museum through 1999.

The Posey home was acquired by the State of Indiana in 2000, but it remained vacant until it was donated to the Historical Society of Harrison County in 2012.

[citation needed] The Westfall House, a log cabin located near the Constitution Elm, is the oldest extant building in Corydon.

[citation needed] William Branham began operating a tavern on the site in 1809 in a structure originally built in 1800.

[27] Originally known as Cedar Glade, the Kintner-McGrain House was the home of Jacob Kintner, who built the Greek Revival-style residence in 1808 near Indian Creek.

It was converted to apartments in the early twentieth century and was used for other commercial purposes until it was renovated into a bed and breakfast inn in 1986–87.

[29] The school is located at the corner of Summit and Hill Streets, a block east of the district's amended boundary line that was established as part of the National Register listing in 1989.