| Constituency Mp: | Lévis |
| Parliament: | Canadian |
| Predecessor: | Joseph-Godéric Blanchet |
| Successor: | Pierre Malcom Guay |
| Term Start: | 1883 |
| Term End: | 1885 |
| Birth Date: | March 7, 1847 |
| Birth Place: | Deschambault, Canada East |
| Death Date: | May 7, 1936 |
| Nationality: | Canadian |
| Party: | Conservative Party |
| Relations: | Isidore Belleau (Father) Marie-Désanges Pagé (Mother) |
| Occupation: | director editor lawyer |
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. He was elected as mayor of Lévis, Quebec between 1891 and 1895. His son-in-law, Émile Fortin, was a senator and Member of Parliament.