Guillaume-Alphonse Nantel (November 4, 1852 – June 3, 1909) was a Canadian lawyer, journalist, author, newspaper owner, and politician.

He resigned less than two months later to allow Joseph-Adolphe Chapleau, the Secretary of State of Canada, to run for office.

In an August 1882 by-election, he was acclaimed to the Legislative Assembly of Quebec in the riding of Terrebonne.

He was the commissioner of public works in the cabinets of Charles-Eugène Boucher de Boucherville and Louis-Olivier Taillon.

This article about a Quebec Member of Parliament from the Conservative Party of Canada (1867–1942) is a stub.