Rainbow[Note 1] was a galleon of the English Tudor navy, built at Deptford Dockyard by Peter Pett (the first of that name in this extensive family), and launched in 1586.

Commanded by Lord Henry Seymour, a younger son of Edward Seymour, 1st Duke of Somerset by his second wife Anne Stanhope, she fought against the Spanish during the Singeing the King of Spain's Beard and the Spanish Armada, including the Battle of Gravelines in 1588.

In 1617 Rainbow was rebuilt at Deptford as a great ship (now described as a "second rate"), mounting 34 major and 6 smaller guns.

[1] She was again reconstructed in 1628–29 at Chatham, although the work was classed as a "repair" rather than as an official rebuilding.

This article about a ship of the line of the United Kingdom is a stub.