The Association operates several historical sites in the county. The Tippecanoe County Historical Museum is housed in the Gothic Revival home built by Moses Fowler in 1851–1852; Fort Ouiatenon recreates an early French trading post blockhouse (1717–1791); and the Tippecanoe Battlefield memorializes the 1812 battle between Indiana Territories and Shawnee forces.

The society offers research library access, occasional living history events, and educational and recreational programs; the museums offers exhibits; the fort offers occasional living history events, exhibits, and tours; the battlefield offers exhibits and tours.

This small brick building is the late 19th-century office and hospital of horse-and-buggy doctor, Dr. William Davies Hutchings. This building contains most of the original equipment from Dr. Hutchings's practice as well as Hutchings's family furnishings.

The office offers tours.

In this reconstructed 1893 firehouse, the public is shown how the Fort Wayne Fire Department developed from a volunteer department (1839–1882) to an organization of paid professionals (1882–present). This history is traced from the use of hand pumpers and neighborhood volunteers through the development of the steamers and paid firefighters right up to the present-day firefighters. Almost all of the artifacts in the museum were once used by the Fort Wayne Fire Department. Most were graciously donated to the Museum by present and former firefighters or their families in the hopes that future generations can fully understand just how far the fire service has come in the last century and a half.

The museums offers exhibits and tours.

The President Benjamin Harrison Home is the former residence of President Benjamin Harrison (1889 to 1893). The museum is dedicated to his achievements
and his impact on United States history.

The home offers exhibits, tours, educational programs, and recreational and educational events (including living history events).

Since 1830, the Society has connected people to the past by collecting, preserving, interpreting, and disseminating the state's history. A nonprofit membership organization, the IHS also publishes books and periodicals; sponsors teacher workshops; provides youth, adult, and family programming; provides support and assistance to local museums and historical groups; and maintains the nation's premier research library and archives on the history of Indiana and the Old Northwest. The society also maintains the Indiana History Center, where events and programs are held and exhibits housed.

The center offers exhibits, tours, lectures, film screenings, research library access, and educational and recreational programs.

The Society seeks to uplift and enrich Gary, Indiana, and surrounding communities by preserving, developing, and sponsoring cultural, historical, and educational programs for citizens of all ages. The Socieety was a catalyst behind the preservation and national historic landmark status of Gary's first building—the 1906 Gary Land Company Building. The Society maintains the buildings as an historical museum and visitor's bureau for school tour groups and visitors to Gary.

The Society offers exhibits and tours.

"Our mission is to unite those people interested in the history of Switzerland County, Indiana, and surrounding region, for its protection, preservation, and promotion to the public."