No, Niagara Falls is not a U.S. National Park, nor is it a Canadian National Park. On the American side, the falls are protected within Niagara Falls State Park, which is actually the oldest state park in the United States, established in 1885. While it is not a "National Park" in the same category as Yellowstone or Yosemite, it is recognized as a National Heritage Area, a designation that acknowledges its immense cultural and historical significance but keeps management at the state level (New York State Office of Parks, Recreation and Historic Preservation). On the Canadian side, the land is managed by The Niagara Parks Commission, a self-funded agency of the Ontario provincial government. While the National Park Service (NPS) has a presence in the region through the "Niagara Falls National Heritage Area" partnership, the falls themselves remain under state and provincial jurisdiction, meaning you won't find the typical "National Park" entrance gate or use an America the Beautiful pass for entry.