Helen Mary Wily (née Harrison, 27 April 1921 – 12 September 2009) was a New Zealand statistician and mathematician.
She was awarded the Queen's Service Medal in the 1988 New Year Honours.
With Sharleen Forbes she ran the first session on gender issues in statistics education, at the third International Conference on Teaching Statistics held in 1990 at Otago University.
She was a strong advocate of equal pay issues in the public service.
She was very involved with the Christchurch branch of the New Zealand Federation of Graduate Women.