Leavenworth Historical Society membership is open to anyone interested in the preservation of Leavenworth County history.
Dues are paid annually in March. Members of the society receive free admission to the museum, copies of the quarterly newsletter, The Historical Society Gazette, and a 10% discount on purchases at the museum gift shop. The membership categories are:
| Membership Fees | |
| $15 | Student |
| $20 | Single Senior (60+) |
| $25 | Individual |
| $40 | Family/Couple |
| $100 | Contributor |
| $250 or above | Patron |
