Matsu
Matsu may refer to:
- Mazu, or Matsu, a sea goddess in Chinese folk religion
 - Matsu-class destroyer, a series of Japanese warships
 - Matsu Islands (Lienchiang County), Fujian, Republic of China (Taiwan)
 - Matsu Beigan Airport
 - Matsushima (Matsu Islands), in Miyagi Prefecture, Japan
 - Japanese ship Matsu, several ships
 - Matsu (Sekirei), a character in the Sekirei manga and anime
 - Japanese pine (まつ, 松), matsu in Japanese
 
See also
- Matanuska-Susitna Valley (Mat-Su Valley, an area in South Central Alaska)
 - Matanuska-Susitna Borough (Mat-Su Borough), a borough of Alaska
 - Mazu (disambiguation), Chinese origin of matsu
 - Open Commons Consortium (Project Matsu), imaging process project for human assisted disaster relief named after the goddess