William Michael Ryan (22 November 1887 – 4 January 1938) was a Liberal party member of the House of Commons of Canada.
He was born in Saint John, New Brunswick and became a barrister and journalist.
Ryan attended University of St. Joseph's College where he earned a Master of Arts degree, then King College Law School where he earned a Bachelor of Civil Law.
He became a journalist for New Brunswick newspaper the Telegraph-Journal and Regina Leader.
Ryan died in Saint John on 4 January 1938 before completing his term in the 18th Canadian Parliament, on the same day that another House of Commons member, George Perley, died.