Keeping Kosher while travelling can be a task.    There are NO Kosher supermarkets in Niagara Falls, but you may find Kosher products in some. 

Dairy;

Top Nosh Niagara Kosher Pizza is a Kosher Pizza - Fries, Fish, Salad & Soup.    Chalav, Bishul and pas yisrael are observed. 

Meat;

FreshBar Kosher  - Falafel, Hot Dogs, Salads

Mendel's Kosher Niagara - Meat, Fish, Salads, Soups, Deserts

For additional resources, visit the Chabad Lubavitch of Niagara website