This section includes organizations from the following counties: Brevard, Indian River, Martin, St. Lucie, and Volusia.

Brevard County:
- Brevard County Historical Commission
- Brevard Museum of History and Natural Science
- Field Manor
- Florida Historical Society Library
- Florida Surf Museum
- Florida Tech Evans Library Archives
- North Brevard Historical Society & Museum
- Pritchard House
Indian River County
- Indian River Citrus Museum
- Indian River County Historical Society
- Julian W. Lowenstein Archive Center & Genealogy Department
- Mel Fisher’s Treasure Museum
- McLarty Treasure Museum
- Sebastian Area Historical Museum
- Sebastian Fishing Museum
Martin County
- Blake Library Genealogy Resources – Martin County Library System
- Historical Society of Martin County: Elliott Museum and Thurlow Library Archives
- House of Refuge Museum
- Stuart Heritage Museum
St. Lucie County
- Kilmer Library – St. Lucie County Library System
- Port St. Lucie Historical Society
- St. Lucie County Regional History Center
- Zora Neale Hurston Library – Dust Tracks Heritage Trail
Volusia County
- Barberville Pioneer Settlement
- Bethune-Cookman University – Carl S. Swisher Library
- DeBary Hall Historic Site
- Enterprise Heritage Center and Museum
- Florida Postal Museum
- Halifax Historical Museum
- Mary S. Harrell Black Heritage Museum
- Museum of Arts and Sciences – Daytona Beach
- New Smyrna Museum of History
- Ponce Inlet Lighthouse and Museum
- Port Orange Historical Trust
- Stetson University Archives and Special Collections
West Volusia Historical Society – DeLand House Museum and Conrad Research Center