Admiral Sir Richard Onslow, 1st Baronet GCB (23 June 1741 – 27 December 1817) was an English naval officer who played a distinguished role in the 1797 Battle of Camperdown.

Onslow sailed for the West Indies on 4 November 1778 with Commodore Hotham, and took part in the capture of Saint Lucia and its defense against d'Estaing that December at the Cul-de-Sac.

[1] He was placed in command of the Bellona,[1] in the Channel Fleet under Admiral Francis Geary, in February 1780, and captured the Dutch 54-gun ship Prinses Carolina on 30 December 1780.

[1] His flag captain, Edward O'Bryen, supposedly warned him that the Dutch ships were too close together to get between, to which Onslow replied "The Monarch will make a passage."

Admiral Rodney gave him command of Achilles on 18 January 1773, in which he returned to England, where he acquired an estate and married Anne, daughter of Commodore Matthew Michell of Chitterne, Wiltshire.

They had five sons and four daughters: Onslow's widow, Dame Anne, died of influenza at Grand Parade, Brighton on 31 January 1837 aged 85 year.

A note found after her death and addressed to her son Sir Henry Onslow Bart, contained the following message: When I am no more, I hope I am going to a world of comfort after all the sorrows I have experienced in this.