The historical resources currently housed at the Chelan Museum include:

- Family files
- Family group sheets
- Photo archives: extensive collection of historical photographs,
             including negatives and photos by L.D. Lindsley
- Newspaper archives
- Obituaries
- Indices for Fraternal and Riverview Cemeteries
- Marriage license index for early Chelan County
- History Notes magazine, published annually by Lake Chelan Historical Society