David Walker Slater (1921 – February 9, 2010) was a Canadian economist, civil servant and former President of York University.
After serving with the Canadian Army in World War II in Europe (and being Mentioned in Dispatches), he received a Bachelor of Arts degree in economics in 1947 from Queen's University.
He received a Master of Arts degree in 1950 and a Ph.D. in 1957 from the University of Chicago.
Joining the Canadian civil service, he was appointed General Director, Fiscal Policy and Economic Analysis Branch, Department of Finance in 1973.
In 1986, he was appointed Chairman of the Government of Ontario's Task Force on Insurance.