Nicholas Trestrail (December 1858 – 1922) was a British mining engineer in Redruth, Cornwall, England.
He was the designer of the Harvey's Engine, a Cornish beam engine initially used as a pumping engine as of 1892 in the Carn Brea mine and from 1924 till 28 September 1954 in the East Pool mine.He was born, worked, lived, and died in Redruth.
He married Grace Wilkins Michell, and had 6 children, and 1 servant.