Niagara, Ontario

Niagara, Ontario may refer to:


 * Niagara-on-the-Lake, formerly called Niagara, a town that was at the mouth of the Niagara River
 * Niagara Falls, Ontario, a city located adjacent to Niagara Falls
 * Niagara Peninsula, a peninsula located between Lake Ontario and Lake Erie
 * Regional Municipality of Niagara, also called Niagara Region, a regional municipality located on the Niagara Peninsula