John Polwhele Blatchley (1 July 1913 – 16 February 2008) was a London-born car designer known for his work with J Gurney Nutting & Co Limited and Rolls-Royce Limited.
He began his career as designer with Nutting in 1935, moving up to Chief Designer before leaving in 1940 to join Rolls-Royce.
There he served as a draughtsman (1940–43), stylist in the car division (1943–55), and chief styling engineer (1955–69).