John Dyson Harrowfield (born 19 February 1953) is a former Australian politician.
He was born in Melbourne to Roy Wilmott Harrowfield and Irene Mary Whitworth.
He attended state schools and then Melbourne University, where he received a Bachelor of Commerce.
He worked as an accountant and as an economics tutor at Melbourne University and the Swinburne and Chisholm Institutes of Technology.
A member of the Labor Party, he was president of the Blackburn North branch from 1974 to 1979.