Isidore-Noël Belleau (March 7, 1847 in Deschambault, Canada West – May 7, 1936) was a Canadian politician, director, editor and lawyer.

He was elected to the House of Commons of Canada in an 1883 by-election to represent the riding of Lévis.

He was also defeated in the elections of 1874 for Portneuf and 1887 for Bellechasse.

His son-in-law, Émile Fortin, was a senator and Member of Parliament.

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