New Grimsby Cornish: Enysgrymm Nowyth
The quay at New Grimsby
New Grimsby Location within Isles of Scilly
Civil parish	Tresco
Unitary authority	Isles of Scilly
Ceremonial county	Cornwall
Region	South West
Country	England
Sovereign state	United Kingdom
Post town	ISLES OF SCILLY
Postcode district	TR24
Dialling code	01720
Police	Devon and Cornwall
Fire	Isles of Scilly
Ambulance	South Western
UK Parliament	St Ives
List of places UK England Cornwall 49°57′18″N 6°20′17″W / 49.955°N 6.338°W / 49.955; -6.338

New Grimsby (Cornish: Enysgrymm Nowyth)^[1] is a coastal settlement on the island of Tresco in the Isles of Scilly, England.^[2] It is located on the west side of the island and there is a quay, as well as a public house, The New Inn,^[3] and a small art gallery.

The southern portion of the modern-day settlement (on the site of Abbey Farm) has greatly expanded in recent years and is now the centre of the island's timeshare holiday community, which includes the Tresco Estate's "Island Office", the island's convenience store (with a post office sub-branch inside) and a restaurant.

Tresco's other main settlement is Old Grimsby, located to the northeast of New Grimsby, on the east coast of the island.