A valid passport or Green Card is required for international travel to Niagara Falls, Canada. The Niagara Falls region is located on the border between the United States and Canada. While no passport is needed to view the falls from the American side, crossing the border into Canada to visit the Canadian side of the falls or explore other areas in Canada will require a valid passport for entry. Ensuring your passport is current before planning your trip to Niagara Falls is essential.