[chm]

There was a massive (relatively speaking) emigration of Canadians (apparently mostly Canadiens français) in the late 19th and early 20th centuries[1]. The estimates for the period are of about 160K to 800K (including descendants) Canadians living in the USA, most of them living in the North-East, and most of them of French descent. An American census of 1870 counted about 160K in New England.

It's hard to get accurate numbers, but there definitely was a substantial number of emigrants.

http://www.cslf.gouv.qc.ca/bibliotheque-virtuelle/publicatio...