HMS Assurance was a 32-gun fourth rate frigate of the English Royal Navy, built by Peter Pett I at Deptford Dockyard and launched in 1646. The term 'frigate' during the period of this ship referred to a method of construction, rather than a role which did not develop until the following century. Samuel Pepys states in his diary that Assurance sank near Woolwich during a storm in December of 1660, with the loss of twenty men. He visited the site a few days later. The ship was subsequently refloated by 17 December. Assurance was sold out of the navy in 1698.