William Stewart Loggie (August 10, 1850 – March 13, 1944) was a merchant and politician of the town of Chatham, New Brunswick, Canada.

Born in Burnt Church, New Brunswick, Loggie, a dynamic man, built a small empire throughout the Miramichi River area.

A Liberal, he represented the riding of Northumberland from 1904 until 1917 when, as a result of the Conscription Crisis he ran for re-election as a Unionist supporting Sir Robert Borden's government.

Kerr's health was failing by 1946 and his brother, Leigh Loggie, returned from the Peace River Country of Alberta where he operated a fur trading business and general store.

W. S. Loggie's three-story Victorian Mansion on Wellington Street in Chatham is now a cultural centre.