My north american history is spotty in some places but if I remember my junior high history New France was all the territories belonging to France in North america. Basically snaking along the St. Lawrence in the north through the great lakes and down the mississipi river to the delta. But usually the northern parts are Canada, the parts that are now the USA mid-west are New France and the Mississpi delta are Louisiana.

Many firsts for Europeans in the new world were French in what is now Canada. For example the first road and first social club were all built by the French in Acadia in like 1605.