Robert Brooke Campbell Scarlett, 6th Baron Abinger (8 January 1876 – 10 June 1927) was a British peer.
In 1904, Scarlett, along with his siblings Hugh, Ruth, Percy, and Leopold, were authorised to use the style The Honourable by a Royal Warrant of Precedence.
Scarlett was a barrister of the Inner Temple and served in the Royal Navy.
In 1917, Lord Abinger married Marguerite Jeanne Steinheil (née Japy).
Steinheil's claims to fame hitherto rested partly from having been obliquely described as present at the death of French President Félix Faure in 1899 and for having been acquitted of murdering her husband in 1909.