The Hay River Highway, officially Northwest Territories Highway 2, is the shortest numbered highway in the Northwest Territories and connects Hay River to the junction of Highway 1 at Enterprise.

Its total length is 38 km (24 mi), all of which is paved.

6.1 km (3.8 mi) south of downtown Hay River, there is a junction with Highway 5.

The highway was originally a portion of the Mackenzie Highway; this status ended with the extension of the highway northwest from Enterprise, first as a route around Great Slave Lake to Yellowknife, and then west to Fort Simpson.

The highway is designated as a core route of Canada's National Highway System.