Canalside, formerly known as Canal Side and also referred to as Erie Canal Harbor, is a commercial and residential district in downtown Buffalo, New York. It is the recreation of the western terminus of the Erie Canal, which was destroyed in the early 20th century. Canalside is situated on the Buffalo River, in an area that was historically home to the Seneca people.

The Erie Canal is a historic canal in upstate New York that runs east–west between the Hudson River and Lake Erie. Completed in 1825, the canal was the first navigable waterway connecting the Atlantic Ocean to the Great Lakes, vastly reducing the costs of transporting people and goods across the Appalachians. In effect, the canal accelerated the settlement of the Great Lakes region, the westward expansion of the United States, and the economic ascendancy of New York State. It has been called "The Nation's First Superhighway."