Onslow Square is a garden square in South Kensington, London, England.[1]
It is set back between the Old Brompton Road to the northwest and the Fulham Road to the southeast. To the north is South Kensington Underground station. To the south is the Royal Marsden Hospital. As well as the main square, the address covers the street to the southwest that turns into Onslow Gardens, and the street to the northwest that meets Pelham Street by South Kensington tube station.