The Newson-Smith Baronetcy, of Totteridge in the County of Hertford, is a title in the Baronetage of the United Kingdom. It was created on 1 December 1944 for Frank Newson-Smith, Lord Mayor of London from 1943 to 1944. He was succeeded by his son, the second Baronet. He was a deputy lieutenant for the City of London. As of 2014 the title is held by the latter's son, the third Baronet, who succeeded in 1997.
The heir apparent is the present holder's son Oliver Nicholas Peter Newson-Smith (born 1975).