- a New York State waterway system. 575 miles (925 km) long.
- the main canal of this system, between the Hudson River and Lake Erie: consists of the rebuilt Erie Canal. 352 miles (565 km) long.
- a system of inland waterways in New York State, connecting the Hudson River with Lakes Erie and Ontario and, via Lake Champlain, with the St Lawrence. Length: 845 km (525 miles)