Teredo may refer to:
- Teredo (genus), a genus of shipworm that bores holes in the wood of ships
- Teredo portoricensis, a species of shipworm in the Teredo genus
- Teredo wood, a form of fossilized wood showing marks of shipworm damage
- Teredo tunneling, a protocol in computer communications for transmission of IPv6 datagrams
- HMS Teredo (P338), a British submarine