Callithamnion baileyi
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Ceramiales
- family: Callithamniaceae
- genus: Callithamnion
- species: Callithamnion baileyi
- Bridgeport
Connecticut- Portland
Maine- Edgartown
- Nantucket
- Newburyport
Massachusetts- Shelter Island
- Shelter Island Heights
New York- Charleston
South Carolina
United States