Walter MacMorris Dack (April 12, 1852 – February 26, 1912) was an Ontario newspaper publisher and political figure.
He represented Bruce Centre in the Legislative Assembly of Ontario from 1886 to 1894 as a Liberal member.
He was born in Markham, Canada West in 1852, the son of John Walter Dack, an immigrant from Ireland.
The township of Dack in Timiskaming District was named after him.
This article about an Ontario Liberal Party MPP is a stub.