As a membership organization, the Historical Society's members play a key role in the ongoing stewardship of Bush-Holley Historic Site. Each year members elect the Officers and Board of Trustees and participate in a wide range of programs and events including tours, education and seasonal programs, special events, research, publications, and volunteer opportunities.

Members receive free admission to the Bush-Holley House, advance notice of programs and events as well as reduced fees for programs, 10% discount in the Museum Shop, and a subscription to the Historical Society's newsletter and program guide. Members at all giving levels receive the same membership benefits.