Neosiphonia harveyi
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Ceramiales
- family: Rhodomelaceae
- genus: Neosiphonia
- species: Neosiphonia harveyi
Xiangyang
Shandong
ChinaMuroran
HokkaidoTakamatsu-shi
Kagawa
Japan- United Kingdom
Bridgeport
Mystic
Niantic
ConnecticutSolomons
MarylandEast Falmouth
Edgartown
Lynn
Mattapoisett
Mattapoisett Center
Nantucket
Oak Bluffs
MassachusettsGreenport
Greenport West
Montauk
Sag Harbor
Sound Beach
New YorkBrices Creek
Trent Woods
North CarolinaWarwick
Rhode Island
United States